Comparing strings in C

main.c

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

int main(int argc, char* argv[]) {
    char str1[] = "abcd1";
    char str2[] = "abcd4";
    
    printf("%d\n", strcmp(str1, str2));
    printf("%d\n", strncmp(str1, str2, 4));
    
    
    char arr1[] = {1, 2, 3};
    char arr2[] = {1, 2, 4};
    
    printf("%d\n", memcmp(arr1, arr2, 3 * sizeof(int)));
    
    return 0;
}