• Source 
    1. #include <stdio.h>
    2. #include <string.h>
    3.  
    4. int main()
    5. {
    6.    char src[40];		// char array of size 40
    7.    char dest[100];		// char array of size 100
    8.  
    9.    memset(dest, '\0', sizeof(dest));					// fill the dest array with nul (\0), specifying the end of the string
    10.    strcpy(src, "This string is 34 characters long.");	// copy a string literal into src
    11.    strcpy(dest, src);									// now copy src into dest
    12.  
    13.    printf("src string : %s\n", src);					// display src
    14.    printf("dest string : %s\n", dest);					// display dest
    15.    printf("Length of dest : %d", strlen(dest));			// use strlen() to find the length of dest
    16.  
    17.    return(0);
    18. }