Print bits for a long int in C

printbits

#include <stdio.h>

int main(){
    printf("bitwise operations\n");
    unsigned long int num = 10;
    int i;
    for(i= (sizeof(unsigned long int)*8)-1;i>= 0; i--){
        char c = (num &(1LL<<i))? '1' : '0';
        putchar(c);
    }
    printf("\n");
}