Converting 0 through 15 to hex numbers

/* 0701.c: Converting 0 through 15 to hex numbers */
#include <stdio.h>

main()
{
    int i;

    printf("Hex(uppercase) Hex(lowercase) Decimal\n");
    for (i=0; i<16; i++){
        printf("%X %x %d\n", i, i, i);
    }
    return 0;
}