Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    int k=0;
    int count =0;
    while(k<32){
if(n&(1<<k)) count++;
k++;
    }
    return count;
}

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