Count Set Bits in an 8-bit Register

Code

#include <stdio.h>
#include <stdint.h>

// int count_set_bits(uint8_t reg) {
//     // Your code here
//     int count = 0;
//     while(reg){
//         count += (reg & 1);
//         reg >>= 1;
//     }
    
//     return count;
// }

int count_set_bits(uint8_t reg){
    int count = 0;
    for(int i = 0; i < 8; i++){
        if(reg & (1 << i)){
            count++;
        }
    }
    return count;
}

int main() {
    uint8_t reg;
    scanf("%hhu", &reg);
    printf("%u", count_set_bits(reg));
    return 0;
}

Solving Approach

 

 

 

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Input

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Expected Output

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