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
    //return 0;
    uint8_t k;
    uint32_t mask;
    for ( k = pos ; k<((pos+len)); k++)
    {

         mask  = mask | (1<<k);

    }

    reg = reg & mask;
    return reg>>pos;
}

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;
}