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
    uint32_t res=0;
    int m=0;
    for(int i=pos-0;i<(pos+len);i++){
       uint8_t bit= (reg>>i)&1;
       res|=(bit<<m);
       m++;
    }
    
    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;
}