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diff --git a/devdocs/c/io%2Fputchar.html b/devdocs/c/io%2Fputchar.html new file mode 100644 index 00000000..aa070ceb --- /dev/null +++ b/devdocs/c/io%2Fputchar.html @@ -0,0 +1,57 @@ + <h1 id="firstHeading" class="firstHeading">putchar</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 putchar( int ch );</pre> +</td> <td class="t-dcl-nopad"> </td> <td class="t-dcl-nopad"> </td> </tr> </table> <p>Writes a character <code>ch</code> to <code><a href="std_streams" title="c/io/std streams">stdout</a></code>. Internally, the character is converted to <code>unsigned char</code> just before being written.</p> +<p>Equivalent to <code><a href="http://en.cppreference.com/w/c/io/fputc"><span class="kw831">putc</span></a><span class="br0">(</span>ch, <a href="http://en.cppreference.com/w/c/io/std_streams"><span class="kw886">stdout</span></a><span class="br0">)</span></code>.</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> +</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><a href="std_streams" title="c/io/std streams">stdout</a></code>.</p> +<h3 id="Example"> Example</h3> <div class="t-example"> +<p>Shows <code>putchar</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 = putchar(c); + + // Test whether EOF was reached. + if (ret_code == EOF && ferror(stdout)) + { + fprintf(stderr, "putchar() failed in file %s at line # %d\n", + __FILE__, __LINE__ - 6); + perror("putchar()"); + exit(EXIT_FAILURE); + } + putchar('\n'); + + // putchar return value is not equal to the argument + int r = 0x1070; + printf("\n0x%x\n", r); + r = putchar(r); + printf("\n0x%x\n", r); +}</pre></div> <p>Output:</p> +<div class="text source-text"><pre data-language="c">abcdefghijklmnopqrstuvwxy + +0x1070 +p +0x70</pre></div> </div> <h3 id="References"> References</h3> <ul> +<li> C23 standard (ISO/IEC 9899:2023): </li> +<ul><li> 7.21.7.8 The putchar function (p: TBD) </li></ul> +<li> C17 standard (ISO/IEC 9899:2018): </li> +<ul><li> 7.21.7.8 The putchar function (p: TBD) </li></ul> +<li> C11 standard (ISO/IEC 9899:2011): </li> +<ul><li> 7.21.7.8 The putchar function (p: 333) </li></ul> +<li> C99 standard (ISO/IEC 9899:1999): </li> +<ul><li> 7.19.7.9 The putchar function (p: 299) </li></ul> +<li> C89/C90 standard (ISO/IEC 9899:1990): </li> +<ul><li> 4.9.7.9 The putchar function </li></ul> +</ul> <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td> <div><a href="fputc" title="c/io/fputc"> <span class="t-lines"><span>fputc</span><span>putc</span></span></a></div> </td> <td> writes a character to a file stream <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/putchar" title="cpp/io/c/putchar">C++ documentation</a></span> for <code>putchar</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/putchar" class="_attribution-link">https://en.cppreference.com/w/c/io/putchar</a> + </p> +</div> |