3. Check if K-th Bit is Set

#include <stdio.h>

int isKthBitSet(int n, int k) {
    int mask=1; //0000 0001
    mask=mask<<k; //0000 1000
    if(n & mask)// 0000 1000 & 0000 1000= 0000 1000 =>1
    return 1;
    else return 0;
}

int main() {
    int n, k;
    scanf("%d %d", &n, &k);
    printf("%d", isKthBitSet(n, k));
    return 0;
}