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diff --git a/devdocs/c/io%2Ffputc.html b/devdocs/c/io%2Ffputc.html new file mode 100644 index 00000000..d3993152 --- /dev/null +++ b/devdocs/c/io%2Ffputc.html @@ -0,0 +1,66 @@ + <h1 id="firstHeading" class="firstHeading">fputc, putc</h1> <table class="t-dcl-begin"> <tr class="t-dsc-header"> <th> Defined in header <code><stdio.h></code> </th> <th> </th> <th> </th> </tr> <tr class="t-dcl"> <td class="t-dcl-nopad"> <pre data-language="c">int fputc( int ch, FILE* stream );</pre> +</td> <td class="t-dcl-nopad"> </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl"> <td class="t-dcl-nopad"> <pre data-language="c">int putc( int ch, FILE* stream );</pre> +</td> <td class="t-dcl-nopad"> </td> <td class="t-dcl-nopad"> </td> </tr> </table> <p>Writes a character <code>ch</code> to the given output stream <code>stream</code>. <code>putc()</code> may be implemented as a macro and evaluate <code>stream</code> more than once, so the corresponding argument should never be an expression with side effects.</p> +<p>Internally, the character is converted to <code>unsigned char</code> just before being written.</p> +<h3 id="Parameters"> Parameters</h3> <table class="t-par-begin"> <tr class="t-par"> <td> ch </td> <td> - </td> <td> character to be written </td> +</tr> <tr class="t-par"> <td> stream </td> <td> - </td> <td> output stream </td> +</tr> +</table> <h3 id="Return_value"> Return value</h3> <p>On success, returns the written character.</p> +<p>On failure, returns <code><a href="../io" title="c/io">EOF</a></code> and sets the <i>error</i> indicator (see <code><a href="ferror" title="c/io/ferror">ferror()</a></code>) on <code>stream</code>.</p> +<h3 id="Example"> Example</h3> <div class="t-example"> +<p>Shows <code>putc</code> with error checking</p> +<div class="c source-c"><pre data-language="c">#include <stdio.h> +#include <stdlib.h> + +int main(void) +{ + int ret_code = 0; + for (char c = 'a'; (ret_code != EOF) && (c != 'z'); c++) + ret_code = putc(c, stdout); + + // Test whether EOF was reached. + if (ret_code == EOF && ferror(stdout)) + { + perror("putc()"); + fprintf(stderr, "putc() failed in file %s at line # %d\n", + __FILE__, __LINE__ - 7); + exit(EXIT_FAILURE); + } + putc('\n', stdout); + + return EXIT_SUCCESS; +}</pre></div> <p>Output:</p> +<div class="text source-text"><pre data-language="c">abcdefghijklmnopqrstuvwxy</pre></div> </div> <h3 id="References"> References</h3> <ul> +<li> C23 standard (ISO/IEC 9899:2023): </li> +<ul> +<li> 7.21.7.3 The fputc function (p: TBD) </li> +<li> 7.21.7.7 The putc function (p: TBD) </li> +</ul> +<li> C17 standard (ISO/IEC 9899:2018): </li> +<ul> +<li> 7.21.7.3 The fputc function (p: TBD) </li> +<li> 7.21.7.7 The putc function (p: TBD) </li> +</ul> +<li> C11 standard (ISO/IEC 9899:2011): </li> +<ul> +<li> 7.21.7.3 The fputc function (p: 331) </li> +<li> 7.21.7.7 The putc function (p: 333) </li> +</ul> +<li> C99 standard (ISO/IEC 9899:1999): </li> +<ul> +<li> 7.19.7.3 The fputc function (p: 297) </li> +<li> 7.19.7.8 The putc function (p: 299) </li> +</ul> +<li> C89/C90 standard (ISO/IEC 9899:1990): </li> +<ul> +<li> 4.9.7.3 The fputc function </li> +<li> 4.9.7.8 The putc function </li> +</ul> +</ul> <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td> <div><a href="putchar" title="c/io/putchar"> <span class="t-lines"><span>putchar</span></span></a></div> </td> <td> writes a character to <code>stdout</code> <br> <span class="t-mark">(function)</span> </td> +</tr> <tr class="t-dsc"> <td colspan="2"> <span><a href="https://en.cppreference.com/w/cpp/io/c/fputc" title="cpp/io/c/fputc">C++ documentation</a></span> for <code>fputc, putc</code> </td> +</tr> </table> <div class="_attribution"> + <p class="_attribution-p"> + © cppreference.com<br>Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.<br> + <a href="https://en.cppreference.com/w/c/io/fputc" class="_attribution-link">https://en.cppreference.com/w/c/io/fputc</a> + </p> +</div> |