memcpy & itoa()

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

int main(int argc, char *argv[])
{
    int num = 1024;
    char a[sizeof(int)] = {0};
    memcpy(a, &num, sizeof(num));
    
    int i = 0;
    for (; i < sizeof(num); ++i)
    {
        printf("a[%d]=%d \n", i, a[i]);
    }


    int k = 0;
    memcpy(&k, a, sizeof(int));
    printf("k = %d", k);
    
    return 0;
}