#include <stdio.h>

using namespace std;
int main() {
    int a{0x1234};
    char greeting[]{"Hello World!"};


    printf("a = %d\n", a);
    printf("a = %10d\n", a);
    printf("a = %x\n", a);
    printf("a = %#x\n", a);
    printf("a = %#o\n", a);
    printf("a = %d, and the string is %s\n", a, greeting);

    return 0;
}