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All C Functions [C++ Reference]
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<h1><a name="all_c_functions" id="all_c_functions">All C Functions</a></h1>
<div class="level1">
<table class="inline">
<tr class="row0">
<td class="col0"><a href="../preprocessor/sharp.html" class="wikilink1" title="preprocessor:sharp"># and ##</a></td><td class="col1">manipulate strings</td>
</tr>
<tr class="row1">
<td class="col0"><a href="../preprocessor/define.html" class="wikilink1" title="preprocessor:define">#define</a></td><td class="col1">define variables</td>
</tr>
<tr class="row2">
<td class="col0"><a href="../preprocessor/error.html" class="wikilink1" title="preprocessor:error">#error</a></td><td class="col1">display an error message</td>
</tr>
<tr class="row3">
<td class="col0"><a href="../preprocessor/preprocessor_if.html" class="wikilink1" title="preprocessor:preprocessor_if">#if, #ifdef, #ifndef, #else, #elif, #endif</a></td><td class="col1">conditional operators</td>
</tr>
<tr class="row4">
<td class="col0"><a href="../preprocessor/include.html" class="wikilink1" title="preprocessor:include">#include</a></td><td class="col1">insert the contents of another file</td>
</tr>
<tr class="row5">
<td class="col0"><a href="../preprocessor/line.html" class="wikilink1" title="preprocessor:line">#line</a></td><td class="col1">set line and file information</td>
</tr>
<tr class="row6">
<td class="col0"><a href="../preprocessor/pragma.html" class="wikilink1" title="preprocessor:pragma">#pragma</a></td><td class="col1">implementation specific command</td>
</tr>
<tr class="row7">
<td class="col0"><a href="../preprocessor/undef.html" class="wikilink1" title="preprocessor:undef">#undef</a></td><td class="col1">used to undefine variables</td>
</tr>
<tr class="row8">
<td class="col0"><a href="../preprocessor/preprocessor_vars.html" class="wikilink1" title="preprocessor:preprocessor_vars">Predefined preprocessor variables</a></td><td class="col1">miscellaneous preprocessor variables</td>
</tr>
<tr class="row9">
<td class="col0"><a href="../c/other/abort.html" class="wikilink1" title="c:other:abort">abort</a> </td><td class="col1">stops the program</td>
</tr>
<tr class="row10">
<td class="col0"><a href="../c/math/abs.html" class="wikilink1" title="c:math:abs">abs</a> </td><td class="col1">absolute value</td>
</tr>
<tr class="row11">
<td class="col0"><a href="../c/math/acos.html" class="wikilink1" title="c:math:acos">acos</a> </td><td class="col1">arc cosine</td>
</tr>
<tr class="row12">
<td class="col0"><a href="../c/date/asctime.html" class="wikilink1" title="c:date:asctime">asctime</a> </td><td class="col1">a textual version of the time</td>
</tr>
<tr class="row13">
<td class="col0"><a href="../c/math/asin.html" class="wikilink1" title="c:math:asin">asin</a> </td><td class="col1">arc sine</td>
</tr>
<tr class="row14">
<td class="col0"><a href="../c/other/assert.html" class="wikilink1" title="c:other:assert">assert</a> </td><td class="col1">stops the program if an expression isn't true</td>
</tr>
<tr class="row15">
<td class="col0"><a href="../c/math/atan.html" class="wikilink1" title="c:math:atan">atan</a> </td><td class="col1">arc tangent</td>
</tr>
<tr class="row16">
<td class="col0"><a href="../c/math/atan2.html" class="wikilink1" title="c:math:atan2">atan2</a> </td><td class="col1">arc tangent, using signs to determine quadrants</td>
</tr>
<tr class="row17">
<td class="col0"><a href="../c/other/atexit.html" class="wikilink1" title="c:other:atexit">atexit</a> </td><td class="col1">sets a function to be called when the program exits</td>
</tr>
<tr class="row18">
<td class="col0"><a href="../c/string/atof.html" class="wikilink1" title="c:string:atof">atof</a> </td><td class="col1">converts a string to a double</td>
</tr>
<tr class="row19">
<td class="col0"><a href="../c/string/atoi.html" class="wikilink1" title="c:string:atoi">atoi</a> </td><td class="col1">converts a string to an integer</td>
</tr>
<tr class="row20">
<td class="col0"><a href="../c/string/atol.html" class="wikilink1" title="c:string:atol">atol</a> </td><td class="col1">converts a string to a long</td>
</tr>
<tr class="row21">
<td class="col0"><a href="../c/other/bsearch.html" class="wikilink1" title="c:other:bsearch">bsearch</a> </td><td class="col1">perform a binary search</td>
</tr>
<tr class="row22">
<td class="col0"><a href="../c/mem/calloc.html" class="wikilink1" title="c:mem:calloc">calloc</a> </td><td class="col1">allocates and clears a chunk of memory</td>
</tr>
<tr class="row23">
<td class="col0"><a href="../c/math/ceil.html" class="wikilink1" title="c:math:ceil">ceil</a> </td><td class="col1">the smallest integer not less than a certain value</td>
</tr>
<tr class="row24">
<td class="col0"><a href="../c/io/clearerr.html" class="wikilink1" title="c:io:clearerr">clearerr</a> </td><td class="col1">clears errors</td>
</tr>
<tr class="row25">
<td class="col0"><a href="../c/date/clock.html" class="wikilink1" title="c:date:clock">clock</a> </td><td class="col1">returns the amount of time that the program has been running</td>
</tr>
<tr class="row26">
<td class="col0"><a href="../c/math/cos.html" class="wikilink1" title="c:math:cos">cos</a> </td><td class="col1">cosine</td>
</tr>
<tr class="row27">
<td class="col0"><a href="../c/math/cosh.html" class="wikilink1" title="c:math:cosh">cosh</a> </td><td class="col1">hyperbolic cosine</td>
</tr>
<tr class="row28">
<td class="col0"><a href="../c/date/ctime.html" class="wikilink1" title="c:date:ctime">ctime</a> </td><td class="col1">returns a specifically formatted version of the time</td>
</tr>
<tr class="row29">
<td class="col0"><a href="../c/date/difftime.html" class="wikilink1" title="c:date:difftime">difftime</a> </td><td class="col1">the difference between two times</td>
</tr>
<tr class="row30">
<td class="col0"><a href="../c/math/div.html" class="wikilink1" title="c:math:div">div</a> </td><td class="col1">returns the quotient and remainder of a division</td>
</tr>
<tr class="row31">
<td class="col0"><a href="../c/other/exit.html" class="wikilink1" title="c:other:exit">exit</a> </td><td class="col1">stop the program</td>
</tr>
<tr class="row32">
<td class="col0"><a href="../c/math/exp.html" class="wikilink1" title="c:math:exp">exp</a> </td><td class="col1">returns “e” raised to a given power</td>
</tr>
<tr class="row33">
<td class="col0"><a href="../c/math/fabs.html" class="wikilink1" title="c:math:fabs">fabs</a> </td><td class="col1">absolute value for floating-point numbers</td>
</tr>
<tr class="row34">
<td class="col0"><a href="../c/io/fclose.html" class="wikilink1" title="c:io:fclose">fclose</a> </td><td class="col1">close a file</td>
</tr>
<tr class="row35">
<td class="col0"><a href="../c/io/feof.html" class="wikilink1" title="c:io:feof">feof</a> </td><td class="col1">true if at the end-of-file</td>
</tr>
<tr class="row36">
<td class="col0"><a href="../c/io/ferror.html" class="wikilink1" title="c:io:ferror">ferror</a> </td><td class="col1">checks for a file error</td>
</tr>
<tr class="row37">
<td class="col0"><a href="../c/io/fflush.html" class="wikilink1" title="c:io:fflush">fflush</a> </td><td class="col1">writes the contents of the output buffer</td>
</tr>
<tr class="row38">
<td class="col0"><a href="../c/io/fgetc.html" class="wikilink1" title="c:io:fgetc">fgetc</a> </td><td class="col1">get a character from a stream</td>
</tr>
<tr class="row39">
<td class="col0"><a href="../c/io/fgetpos.html" class="wikilink1" title="c:io:fgetpos">fgetpos</a> </td><td class="col1">get the file position indicator</td>
</tr>
<tr class="row40">
<td class="col0"><a href="../c/io/fgets.html" class="wikilink1" title="c:io:fgets">fgets</a> </td><td class="col1">get a string of characters from a stream</td>
</tr>
<tr class="row41">
<td class="col0"><a href="../c/math/floor.html" class="wikilink1" title="c:math:floor">floor</a> </td><td class="col1">returns the largest integer not greater than a given value</td>
</tr>
<tr class="row42">
<td class="col0"><a href="../c/math/fmod.html" class="wikilink1" title="c:math:fmod">fmod</a> </td><td class="col1">returns the remainder of a division</td>
</tr>
<tr class="row43">
<td class="col0"><a href="../c/io/fopen.html" class="wikilink1" title="c:io:fopen">fopen</a> </td><td class="col1">open a file</td>
</tr>
<tr class="row44">
<td class="col0"><a href="../c/io/fprintf.html" class="wikilink1" title="c:io:fprintf">fprintf</a> </td><td class="col1">print formatted output to a file</td>
</tr>
<tr class="row45">
<td class="col0"><a href="../c/io/fputc.html" class="wikilink1" title="c:io:fputc">fputc</a> </td><td class="col1">write a character to a file</td>
</tr>
<tr class="row46">
<td class="col0"><a href="../c/io/fputs.html" class="wikilink1" title="c:io:fputs">fputs</a> </td><td class="col1">write a string to a file</td>
</tr>
<tr class="row47">
<td class="col0"><a href="../c/io/fread.html" class="wikilink1" title="c:io:fread">fread</a> </td><td class="col1">read from a file</td>
</tr>
<tr class="row48">
<td class="col0"><a href="../c/mem/free.html" class="wikilink1" title="c:mem:free">free</a> </td><td class="col1">returns previously allocated memory to the operating system</td>
</tr>
<tr class="row49">
<td class="col0"><a href="../c/io/freopen.html" class="wikilink1" title="c:io:freopen">freopen</a> </td><td class="col1">open an existing stream with a different name</td>
</tr>
<tr class="row50">
<td class="col0"><a href="../c/math/frexp.html" class="wikilink1" title="c:math:frexp">frexp</a> </td><td class="col1">decomposes a number into scientific notation</td>
</tr>
<tr class="row51">
<td class="col0"><a href="../c/io/fscanf.html" class="wikilink1" title="c:io:fscanf">fscanf</a> </td><td class="col1">read formatted input from a file</td>
</tr>
<tr class="row52">
<td class="col0"><a href="../c/io/fseek.html" class="wikilink1" title="c:io:fseek">fseek</a> </td><td class="col1">move to a specific location in a file</td>
</tr>
<tr class="row53">
<td class="col0"><a href="../c/io/fsetpos.html" class="wikilink1" title="c:io:fsetpos">fsetpos</a> </td><td class="col1">move to a specific location in a file</td>
</tr>
<tr class="row54">
<td class="col0"><a href="../c/io/ftell.html" class="wikilink1" title="c:io:ftell">ftell</a> </td><td class="col1">returns the current file position indicator</td>
</tr>
<tr class="row55">
<td class="col0"><a href="../c/io/fwrite.html" class="wikilink1" title="c:io:fwrite">fwrite</a> </td><td class="col1">write to a file</td>
</tr>
<tr class="row56">
<td class="col0"><a href="../c/io/getc.html" class="wikilink1" title="c:io:getc">getc</a> </td><td class="col1">read a character from a file</td>
</tr>
<tr class="row57">
<td class="col0"><a href="../c/io/getchar.html" class="wikilink1" title="c:io:getchar">getchar</a> </td><td class="col1">read a character from STDIN</td>
</tr>
<tr class="row58">
<td class="col0"><a href="../c/other/getenv.html" class="wikilink1" title="c:other:getenv">getenv</a> </td><td class="col1">get enviornment information about a variable</td>
</tr>
<tr class="row59">
<td class="col0"><a href="../c/io/gets.html" class="wikilink1" title="c:io:gets">gets</a> </td><td class="col1">read a string from STDIN</td>
</tr>
<tr class="row60">
<td class="col0"><a href="../c/date/gmtime.html" class="wikilink1" title="c:date:gmtime">gmtime</a> </td><td class="col1">returns a pointer to the current Greenwich Mean Time</td>
</tr>
<tr class="row61">
<td class="col0"><a href="../c/string/isalnum.html" class="wikilink1" title="c:string:isalnum">isalnum</a> </td><td class="col1">true if a character is alphanumeric</td>
</tr>
<tr class="row62">
<td class="col0"><a href="../c/string/isalpha.html" class="wikilink1" title="c:string:isalpha">isalpha</a> </td><td class="col1">true if a character is alphabetic</td>
</tr>
<tr class="row63">
<td class="col0"><a href="../c/string/iscntrl.html" class="wikilink1" title="c:string:iscntrl">iscntrl</a> </td><td class="col1">true if a character is a control character</td>
</tr>
<tr class="row64">
<td class="col0"><a href="../c/string/isdigit.html" class="wikilink1" title="c:string:isdigit">isdigit</a> </td><td class="col1">true if a character is a digit</td>
</tr>
<tr class="row65">
<td class="col0"><a href="../c/string/isgraph.html" class="wikilink1" title="c:string:isgraph">isgraph</a> </td><td class="col1">true if a character is a graphical character</td>
</tr>
<tr class="row66">
<td class="col0"><a href="../c/string/islower.html" class="wikilink1" title="c:string:islower">islower</a> </td><td class="col1">true if a character is lowercase</td>
</tr>
<tr class="row67">
<td class="col0"><a href="../c/string/isprint.html" class="wikilink1" title="c:string:isprint">isprint</a> </td><td class="col1">true if a character is a printing character</td>
</tr>
<tr class="row68">
<td class="col0"><a href="../c/string/ispunct.html" class="wikilink1" title="c:string:ispunct">ispunct</a> </td><td class="col1">true if a character is punctuation</td>
</tr>
<tr class="row69">
<td class="col0"><a href="../c/string/isspace.html" class="wikilink1" title="c:string:isspace">isspace</a> </td><td class="col1">true if a character is a space character</td>
</tr>
<tr class="row70">
<td class="col0"><a href="../c/string/isupper.html" class="wikilink1" title="c:string:isupper">isupper</a> </td><td class="col1">true if a character is an uppercase character</td>
</tr>
<tr class="row71">
<td class="col0"><a href="../c/string/isxdigit.html" class="wikilink1" title="c:string:isxdigit">isxdigit</a> </td><td class="col1">true if a character is a hexidecimal character</td>
</tr>
<tr class="row72">
<td class="col0"><a href="../c/math/labs.html" class="wikilink1" title="c:math:labs">labs</a> </td><td class="col1">absolute value for long integers</td>
</tr>
<tr class="row73">
<td class="col0"><a href="../c/math/ldexp.html" class="wikilink1" title="c:math:ldexp">ldexp</a> </td><td class="col1">computes a number in scientific notation</td>
</tr>
<tr class="row74">
<td class="col0"><a href="../c/math/ldiv.html" class="wikilink1" title="c:math:ldiv">ldiv</a> </td><td class="col1">returns the quotient and remainder of a division, in long integer form</td>
</tr>
<tr class="row75">
<td class="col0"><a href="../c/date/localtime.html" class="wikilink1" title="c:date:localtime">localtime</a> </td><td class="col1">returns a pointer to the current time</td>
</tr>
<tr class="row76">
<td class="col0"><a href="../c/math/log.html" class="wikilink1" title="c:math:log">log</a> </td><td class="col1">natural logarithm</td>
</tr>
<tr class="row77">
<td class="col0"><a href="../c/math/log10.html" class="wikilink1" title="c:math:log10">log10</a> </td><td class="col1">natural logarithm, in base 10</td>
</tr>
<tr class="row78">
<td class="col0"><a href="../c/other/longjmp.html" class="wikilink1" title="c:other:longjmp">longjmp</a> </td><td class="col1">start execution at a certain point in the program</td>
</tr>
<tr class="row79">
<td class="col0"><a href="../c/mem/malloc.html" class="wikilink1" title="c:mem:malloc">malloc</a> </td><td class="col1">allocates memory</td>
</tr>
<tr class="row80">
<td class="col0"><a href="../c/string/memchr.html" class="wikilink1" title="c:string:memchr">memchr</a> </td><td class="col1">searches an array for the first occurance of a character</td>
</tr>
<tr class="row81">
<td class="col0"><a href="../c/string/memcmp.html" class="wikilink1" title="c:string:memcmp">memcmp</a> </td><td class="col1">compares two buffers</td>
</tr>
<tr class="row82">
<td class="col0"><a href="../c/string/memcpy.html" class="wikilink1" title="c:string:memcpy">memcpy</a> </td><td class="col1">copies one buffer to another</td>
</tr>
<tr class="row83">
<td class="col0"><a href="../c/string/memmove.html" class="wikilink1" title="c:string:memmove">memmove</a> </td><td class="col1">moves one buffer to another</td>
</tr>
<tr class="row84">
<td class="col0"><a href="../c/string/memset.html" class="wikilink1" title="c:string:memset">memset</a> </td><td class="col1">fills a buffer with a character</td>
</tr>
<tr class="row85">
<td class="col0"><a href="../c/date/mktime.html" class="wikilink1" title="c:date:mktime">mktime</a> </td><td class="col1">returns the calendar version of a given time</td>
</tr>
<tr class="row86">
<td class="col0"><a href="../c/math/modf.html" class="wikilink1" title="c:math:modf">modf</a> </td><td class="col1">decomposes a number into integer and fractional parts</td>
</tr>
<tr class="row87">
<td class="col0"><a href="../c/io/perror.html" class="wikilink1" title="c:io:perror">perror</a> </td><td class="col1">displays a string version of the current error to STDERR</td>
</tr>
<tr class="row88">
<td class="col0"><a href="../c/math/pow.html" class="wikilink1" title="c:math:pow">pow</a> </td><td class="col1">returns a given number raised to another number</td>
</tr>
<tr class="row89">
<td class="col0"><a href="../c/io/printf.html" class="wikilink1" title="c:io:printf">printf</a> </td><td class="col1">write formatted output to STDOUT</td>
</tr>
<tr class="row90">
<td class="col0"><a href="../c/io/putc.html" class="wikilink1" title="c:io:putc">putc</a> </td><td class="col1">write a character to a stream</td>
</tr>
<tr class="row91">
<td class="col0"><a href="../c/io/putchar.html" class="wikilink1" title="c:io:putchar">putchar</a> </td><td class="col1">write a character to STDOUT</td>
</tr>
<tr class="row92">
<td class="col0"><a href="../c/other/putenv.html" class="wikilink1" title="c:other:putenv">putenv</a> </td><td class="col1">add/modify the environmental settings</td>
</tr>
<tr class="row93">
<td class="col0"><a href="../c/io/puts.html" class="wikilink1" title="c:io:puts">puts</a> </td><td class="col1">write a string to STDOUT</td>
</tr>
<tr class="row94">
<td class="col0"><a href="../c/other/qsort.html" class="wikilink1" title="c:other:qsort">qsort</a> </td><td class="col1">perform a quicksort</td>
</tr>
<tr class="row95">
<td class="col0"><a href="../c/other/raise.html" class="wikilink1" title="c:other:raise">raise</a> </td><td class="col1">send a signal to the program</td>
</tr>
<tr class="row96">
<td class="col0"><a href="../c/other/rand.html" class="wikilink1" title="c:other:rand">rand</a> </td><td class="col1">returns a pseudorandom number</td>
</tr>
<tr class="row97">
<td class="col0"><a href="../c/mem/realloc.html" class="wikilink1" title="c:mem:realloc">realloc</a> </td><td class="col1">changes the size of previously allocated memory</td>
</tr>
<tr class="row98">
<td class="col0"><a href="../c/io/remove.html" class="wikilink1" title="c:io:remove">remove</a> </td><td class="col1">erase a file</td>
</tr>
<tr class="row99">
<td class="col0"><a href="../c/io/rename.html" class="wikilink1" title="c:io:rename">rename</a> </td><td class="col1">rename a file</td>
</tr>
<tr class="row100">
<td class="col0"><a href="../c/io/rewind.html" class="wikilink1" title="c:io:rewind">rewind</a> </td><td class="col1">move the file position indicator to the beginning of a file</td>
</tr>
<tr class="row101">
<td class="col0"><a href="../c/io/scanf.html" class="wikilink1" title="c:io:scanf">scanf</a> </td><td class="col1">read formatted input from STDIN</td>
</tr>
<tr class="row102">
<td class="col0"><a href="../c/io/setbuf.html" class="wikilink1" title="c:io:setbuf">setbuf</a> </td><td class="col1">set the buffer for a specific stream</td>
</tr>
<tr class="row103">
<td class="col0"><a href="../c/other/setjmp.html" class="wikilink1" title="c:other:setjmp">setjmp</a> </td><td class="col1">set execution to start at a certain point</td>
</tr>
<tr class="row104">
<td class="col0"><a href="../c/date/setlocale.html" class="wikilink1" title="c:date:setlocale">setlocale</a> </td><td class="col1">sets the current locale</td>
</tr>
<tr class="row105">
<td class="col0"><a href="../c/io/setvbuf.html" class="wikilink1" title="c:io:setvbuf">setvbuf</a> </td><td class="col1">set the buffer and size for a specific stream</td>
</tr>
<tr class="row106">
<td class="col0"><a href="../c/other/signal.html" class="wikilink1" title="c:other:signal">signal</a> </td><td class="col1">register a function as a signal handler</td>
</tr>
<tr class="row107">
<td class="col0"><a href="../c/math/sin.html" class="wikilink1" title="c:math:sin">sin</a> </td><td class="col1">sine</td>
</tr>
<tr class="row108">
<td class="col0"><a href="../c/math/sinh.html" class="wikilink1" title="c:math:sinh">sinh</a> </td><td class="col1">hyperbolic sine</td>
</tr>
<tr class="row109">
<td class="col0"><a href="../c/io/sprintf.html" class="wikilink1" title="c:io:sprintf">sprintf</a> </td><td class="col1">write formatted output to a buffer</td>
</tr>
<tr class="row110">
<td class="col0"><a href="../c/math/sqrt.html" class="wikilink1" title="c:math:sqrt">sqrt</a> </td><td class="col1">square root</td>
</tr>
<tr class="row111">
<td class="col0"><a href="../c/other/srand.html" class="wikilink1" title="c:other:srand">srand</a> </td><td class="col1">initialize the random number generator</td>
</tr>
<tr class="row112">
<td class="col0"><a href="../c/io/sscanf.html" class="wikilink1" title="c:io:sscanf">sscanf</a> </td><td class="col1">read formatted input from a buffer</td>
</tr>
<tr class="row113">
<td class="col0"><a href="../c/string/strcat.html" class="wikilink1" title="c:string:strcat">strcat</a> </td><td class="col1">concatenates two strings</td>
</tr>
<tr class="row114">
<td class="col0"><a href="../c/string/strchr.html" class="wikilink1" title="c:string:strchr">strchr</a> </td><td class="col1">finds the first occurance of a character in a string</td>
</tr>
<tr class="row115">
<td class="col0"><a href="../c/string/strcmp.html" class="wikilink1" title="c:string:strcmp">strcmp</a> </td><td class="col1">compares two strings</td>
</tr>
<tr class="row116">
<td class="col0"><a href="../c/string/strcoll.html" class="wikilink1" title="c:string:strcoll">strcoll</a> </td><td class="col1">compares two strings in accordance to the current locale</td>
</tr>
<tr class="row117">
<td class="col0"><a href="../c/string/strcpy.html" class="wikilink1" title="c:string:strcpy">strcpy</a> </td><td class="col1">copies one string to another</td>
</tr>
<tr class="row118">
<td class="col0"><a href="../c/string/strcspn.html" class="wikilink1" title="c:string:strcspn">strcspn</a> </td><td class="col1">searches one string for any characters in another</td>
</tr>
<tr class="row119">
<td class="col0"><a href="../c/string/strerror.html" class="wikilink1" title="c:string:strerror">strerror</a> </td><td class="col1">returns a text version of a given error code</td>
</tr>
<tr class="row120">
<td class="col0"><a href="../c/date/strftime.html" class="wikilink1" title="c:date:strftime">strftime</a> </td><td class="col1">returns individual elements of the date and time</td>
</tr>
<tr class="row121">
<td class="col0"><a href="../c/string/strlen.html" class="wikilink1" title="c:string:strlen">strlen</a> </td><td class="col1">returns the length of a given string</td>
</tr>
<tr class="row122">
<td class="col0"><a href="../c/string/strncat.html" class="wikilink1" title="c:string:strncat">strncat</a> </td><td class="col1">concatenates a certain amount of characters of two strings</td>
</tr>
<tr class="row123">
<td class="col0"><a href="../c/string/strncmp.html" class="wikilink1" title="c:string:strncmp">strncmp</a> </td><td class="col1">compares a certain amount of characters of two strings</td>
</tr>
<tr class="row124">
<td class="col0"><a href="../c/string/strncpy.html" class="wikilink1" title="c:string:strncpy">strncpy</a> </td><td class="col1">copies a certain amount of characters from one string to another</td>
</tr>
<tr class="row125">
<td class="col0"><a href="../c/string/strpbrk.html" class="wikilink1" title="c:string:strpbrk">strpbrk</a> </td><td class="col1">finds the first location of any character in one string, in another string</td>
</tr>
<tr class="row126">
<td class="col0"><a href="../c/string/strrchr.html" class="wikilink1" title="c:string:strrchr">strrchr</a> </td><td class="col1">finds the last occurance of a character in a string</td>
</tr>
<tr class="row127">
<td class="col0"><a href="../c/string/strspn.html" class="wikilink1" title="c:string:strspn">strspn</a> </td><td class="col1">returns the length of a substring of characters of a string</td>
</tr>
<tr class="row128">
<td class="col0"><a href="../c/string/strstr.html" class="wikilink1" title="c:string:strstr">strstr</a> </td><td class="col1">finds the first occurance of a substring of characters</td>
</tr>
<tr class="row129">
<td class="col0"><a href="../c/string/strtod.html" class="wikilink1" title="c:string:strtod">strtod</a> </td><td class="col1">converts a string to a double</td>
</tr>
<tr class="row130">
<td class="col0"><a href="../c/string/strtok.html" class="wikilink1" title="c:string:strtok">strtok</a> </td><td class="col1">finds the next token in a string</td>
</tr>
<tr class="row131">
<td class="col0"><a href="../c/string/strtol.html" class="wikilink1" title="c:string:strtol">strtol</a> </td><td class="col1">converts a string to a long</td>
</tr>
<tr class="row132">
<td class="col0"><a href="../c/string/strtoul.html" class="wikilink1" title="c:string:strtoul">strtoul</a> </td><td class="col1">converts a string to an unsigned long</td>
</tr>
<tr class="row133">
<td class="col0"><a href="../c/string/strxfrm.html" class="wikilink1" title="c:string:strxfrm">strxfrm</a> </td><td class="col1">converts a substring so that it can be used by string comparison functions</td>
</tr>
<tr class="row134">
<td class="col0"><a href="../c/other/system.html" class="wikilink1" title="c:other:system">system</a> </td><td class="col1">perform a system call</td>
</tr>
<tr class="row135">
<td class="col0"><a href="../c/math/tan.html" class="wikilink1" title="c:math:tan">tan</a> </td><td class="col1">tangent</td>
</tr>
<tr class="row136">
<td class="col0"><a href="../c/math/tanh.html" class="wikilink1" title="c:math:tanh">tanh</a> </td><td class="col1">hyperbolic tangent</td>
</tr>
<tr class="row137">
<td class="col0"><a href="../c/date/time.html" class="wikilink1" title="c:date:time">time</a> </td><td class="col1">returns the current calendar time of the system</td>
</tr>
<tr class="row138">
<td class="col0"><a href="../c/io/tmpfile.html" class="wikilink1" title="c:io:tmpfile">tmpfile</a> </td><td class="col1">return a pointer to a temporary file</td>
</tr>
<tr class="row139">
<td class="col0"><a href="../c/io/tmpnam.html" class="wikilink1" title="c:io:tmpnam">tmpnam</a> </td><td class="col1">return a unique filename</td>
</tr>
<tr class="row140">
<td class="col0"><a href="../c/string/tolower.html" class="wikilink1" title="c:string:tolower">tolower</a> </td><td class="col1">converts a character to lowercase</td>
</tr>
<tr class="row141">
<td class="col0"><a href="../c/string/toupper.html" class="wikilink1" title="c:string:toupper">toupper</a> </td><td class="col1">converts a character to uppercase</td>
</tr>
<tr class="row142">
<td class="col0"><a href="../c/io/ungetc.html" class="wikilink1" title="c:io:ungetc">ungetc</a> </td><td class="col1">puts a character back into a stream</td>
</tr>
<tr class="row143">
<td class="col0"><a href="../c/other/va_arg.html" class="wikilink1" title="c:other:va_arg">va_arg</a> </td><td class="col1">use variable length parameter lists</td>
</tr>
<tr class="row144">
<td class="col0"><a href="../c/io/vprintf_vfprintf_vsprintf.html" class="wikilink1" title="c:io:vprintf_vfprintf_vsprintf">vprintf, vfprintf, and vsprintf</a> </td><td class="col1">write formatted output with variable argument lists</td>
</tr>
<tr class="row145">
<td class="col0"><a href="../c/io/vscanf_vfscanf_vsscanf.html" class="wikilink1" title="c:io:vscanf_vfscanf_vsscanf">vscanf, vfscanf, vsscanf</a> </td><td class="col1">gets formatted input from stdin with variable argument lists</td>
</tr>
</table>
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