Differences

This shows you the differences between two versions of the page.

--- 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)
@@ Line 1: / Line 1: @@
-    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

on the occasion of the current invasion of Russia in Ukraine