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 length){
    uint32_t x = 0; 
    uint8_t end = pos + length - 1; 
    uint8_t count = 0; 
    for(uint8_t i=pos; i<= end; i++){
        x = x | ( ((reg>>i) & 0x1) << count) ;
        count++; 
    }
    return x;
}

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