19. Extract a Bit Field from a 32-bit Register

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

uint32_t extract_field(uint32_t reg, uint8_t pos, uint8_t len) {
    // Your code here
    uint8_t cnt=0;
    uint32_t res=0; 
    uint32_t tmp=0;
    reg>>=pos;

    while (cnt<len){
        tmp=(reg>>cnt)&1;
        if (tmp){
            res|=(1<<cnt);
        }
        cnt++;
        
        
    }
    return res;
}

int main() {
    uint32_t reg;
    uint8_t pos, len;
    scanf("%u %hhu %hhu", &reg, &pos, &len);
    printf("%u", extract_field(reg, pos, len));
    return 0;
}