diff options
Diffstat (limited to 'devdocs/c/program%2Fexit_status.html')
| -rw-r--r-- | devdocs/c/program%2Fexit_status.html | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/devdocs/c/program%2Fexit_status.html b/devdocs/c/program%2Fexit_status.html new file mode 100644 index 00000000..89cd2252 --- /dev/null +++ b/devdocs/c/program%2Fexit_status.html @@ -0,0 +1,41 @@ + <h1 id="firstHeading" class="firstHeading">EXIT_SUCCESS, EXIT_FAILURE</h1> <table class="t-dcl-begin"> <tr class="t-dsc-header"> <th> Defined in header <code><stdlib.h></code> </th> <th> </th> <th> </th> </tr> <tr class="t-dcl"> <td class="t-dcl-nopad"> <pre data-language="c">#define EXIT_SUCCESS /*implementation defined*/</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">#define EXIT_FAILURE /*implementation defined*/</pre> +</td> <td class="t-dcl-nopad"> </td> <td class="t-dcl-nopad"> </td> </tr> </table> <p>The <code>EXIT_SUCCESS</code> and <code>EXIT_FAILURE</code> macros expand into integral expressions that can be used as arguments to the <code><a href="exit" title="c/program/exit">exit</a></code> function (and, therefore, as the values to return from the <a href="../language/main_function" title="c/language/main function">main function</a>), and indicate program execution status.</p> +<table class="t-dsc-begin"> <tr class="t-dsc-hitem"> <th> Constant </th> <th> Explanation </th> +</tr> <tr class="t-dsc"> <td> <code>EXIT_SUCCESS</code> </td> <td> successful execution of a program </td> +</tr> <tr class="t-dsc"> <td> <code>EXIT_FAILURE</code> </td> <td> unsuccessful execution of a program </td> +</tr> </table> <h3 id="Notes"> Notes</h3> <p>Both <code>EXIT_SUCCESS</code> and the value zero indicate successful program execution status (see <code><a href="exit" title="c/program/exit">exit</a></code>), although it is not required that <code>EXIT_SUCCESS</code> equals zero.</p> +<h3 id="Example"> Example</h3> <div class="t-example"> <div class="c source-c"><pre data-language="c">#include <stdio.h> +#include <stdlib.h> + +int main(void) +{ + FILE *fp = fopen("data.txt","r"); + if (fp == NULL) + { + fprintf(stderr, "fopen() failed in file %s at line # %d", __FILE__,__LINE__); + exit(EXIT_FAILURE); + } + + /* Normal processing continues here. */ + fclose(fp); + printf("Normal Return\n"); + + return EXIT_SUCCESS; +}</pre></div> <p>Output:</p> +<div class="text source-text"><pre data-language="c">fopen() failed in file main.cpp at line # 9</pre></div> </div> <h3 id="References"> References</h3> <ul> +<li> C17 standard (ISO/IEC 9899:2018): </li> +<ul><li> 7.22/3 General utilities <stdlib.h> (p: 248) </li></ul> +<li> C11 standard (ISO/IEC 9899:2011): </li> +<ul><li> 7.22/3 General utilities <stdlib.h> (p: 340) </li></ul> +<li> C99 standard (ISO/IEC 9899:1999): </li> +<ul><li> 7.20/3 General utilities <stdlib.h> (p: 306) </li></ul> +<li> C89/C90 standard (ISO/IEC 9899:1990): </li> +<ul><li> 4.10 General utilities <stdlib.h> </li></ul> +</ul> <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td colspan="2"> <span><a href="https://en.cppreference.com/w/cpp/utility/program/EXIT_status" title="cpp/utility/program/EXIT status">C++ documentation</a></span> for <code>EXIT_SUCCESS, EXIT_FAILURE</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/program/EXIT_status" class="_attribution-link">https://en.cppreference.com/w/c/program/EXIT_status</a> + </p> +</div> |