Extract a Bit Field from a 32-bit Register

Code

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

uint32_t extract_field(uint32_t reg, uint8_t pos, uint8_t len) {
    // Your code here
    uint32_t number = 0;

    if (pos + len > 32)
      return 0;

    for (uint8_t k = pos; k < pos + len; k++)
      number |= ((reg & (1 << k)));

    /* number should contain only the value represented by extracted bits */
    number >>= pos;
      
    return number;
}

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;
}

Solving Approach