Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) 
{
    int count=0,temp;
    for(int i=0; i<32; i++){
        if(temp = (n>>i) & 1)
        count++;
    }
    return count;
}

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