Bitwise operators in C

main.c

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

int main(int argc, char* argv[]) {
    int r;
    r = 9 & 5;
    printf("Result: %d\n", r);
    r = 9 | 5;
    printf("Result: %d\n", r);
    r = 9 ^ 5;
    printf("Result: %d\n", r);
    unsigned int p = ~5;
    printf("Result: %d\n", p);
    return 0;
}