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c:string.h:strerror [2012/07/16 22:41] 127.0.0.1 external edit |
c:string.h:strerror [2024/02/16 01:06] (current) |
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- | char *strerror(int errnum); | + | {{keywords>wiki library source code example reference}} |
+ | ====== strerror ====== | ||
+ | <code c> | ||
+ | #include <string.h> | ||
+ | //#include <windows.h> /* uncomment this for Windows */ | ||
+ | char *strerror(int errnum); | ||
+ | </code> | ||
+ | |||
+ | === Description === | ||
+ | returns a pointer to a string that describes the error code passed in the argument errnum | ||
+ | |||
+ | |||
+ | |||
+ | compile this example with the compiler flag **-lm** | ||
+ | ===== strerror C Example Code ===== | ||
+ | <code c> | ||
+ | /* | ||
+ | * strcspn c example code | ||
+ | * http://code-reference.com/c/string.h/strerror | ||
+ | */ | ||
+ | #include <stdio.h> | ||
+ | #include <string.h> | ||
+ | #include <errno.h> | ||
+ | #include <math.h> | ||
+ | |||
+ | int main ( void ) { | ||
+ | |||
+ | double i; | ||
+ | i = sqrt(-1); | ||
+ | printf("sqrt(-1)=%f\n",i); | ||
+ | printf("%s\n", strerror(errno)); | ||
+ | return 0; | ||
+ | } | ||
+ | |||
+ | </code> | ||
+ | |||
+ | |||
+ | === Output of strerror example === | ||
+ | sqrt(-1)=-nan | ||
+ | Numerical argument out of domain | ||
+ | |||
+ |