Count Set Bits in an Integer

Code

#include <stdio.h>
#include <cstdint>
int countSetBits(unsigned int n) {
    int c=0;
    for(int i=0;i<32;i++){
        uint8_t a=0;
        a=1&(n>>i);
        if(a==1)
         c++;
    }
    return c;
}

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

Solving Approach