Count Set Bits in an Integer

#include <stdio.h>
int countSetBits(unsigned int n) 
{
    unsigned int bit1=0,bit0=0;
    for(unsigned int i=0;i<32;i++)
    {
        unsigned int result = ((n>>i)&1);
        if(result==1)
        {
            bit1 ++;
        }
        else if(result==0)
        {
         bit0 ++;
        }
    }
    return bit1;
}

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