C examples for Memory:Memory Function
Demonstrating memset(), memcpy(), and memmove().
#include <stdio.h> #include <string.h> char message1[60] = "this is a test from book2s.com"; char message2[60] = "abcdefghijklmnopqrstuvwxyz"; char temp[60];/*from w w w.j av a2 s . c o m*/ int main( void ) { printf("\nmessage1[] before memset():\t%s", message1); memset(message1 + 5, '@', 10); printf("\nmessage1[] after memset():\t%s", message1); strcpy(temp, message2); printf("\n\nOriginal message: %s", temp); memcpy(temp + 4, temp + 16, 10); printf("\nAfter memcpy() without overlap:\t%s", temp); strcpy(temp, message2); memcpy(temp + 6, temp + 4, 10); printf("\nAfter memcpy() with overlap:\t%s", temp); strcpy(temp, message2); printf("\n\nOriginal message: %s", temp); memmove(temp + 4, temp + 16, 10); printf("\nAfter memmove() without overlap:\t%s", temp); strcpy(temp, message2); memmove(temp + 6, temp + 4, 10); printf("\nAfter memmove() with overlap:\t%s\n", temp); return 0; }