Test of string copying with memcpy()

candle_test.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_LETTERS 5

int main(int argc, char *argv[])
{
    const char *source = "candle";
    char *destination = NULL;
    destination = malloc(MAX_LETTERS + 1);
    if (!destination) {
        fprintf(stderr, "Error: Could not allocate space for destination string\n");
        return EXIT_FAILURE;
    }
    if (strlen(source) > MAX_LETTERS) {
        memcpy(destination, source, MAX_LETTERS);
        destination[MAX_LETTERS] = '\0'; /* add null terminator */
    }
    else {
        memcpy(destination, source, strlen(source) + 1); /* copy over null from source */
    }
    fprintf(stdout, "destination: [%s]\n", destination);
    free(destination);
    
    return EXIT_SUCCESS;
}

Compile with: $ gcc -Wall candle_test.c -o candle_test