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) 
{
//initially we need to rightshift by pos,so that we can access required bits
//once, it is right shifted we need to perform AND opeartion with mask to extract specifc number of bits.
    return ((reg>>pos)&((1<<len)-1));
}

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