Count Set Bits in an Integer

Code

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int RetVal = 0;
    unsigned int tempN = n;
    while (tempN)
    {
        if (tempN & 0x1) {RetVal++;}
        tempN >>= 1;
    }
    return RetVal;
}

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

Solving Approach