Extract Bit Field from 16-bit Register

Code

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

uint8_t extract_field(uint16_t reg) {

    uint16_t mask = ((1 << 5) - 1)<<4;

    uint8_t val;

    val = (reg & mask)>>4;

    // Your logic here
    return val;
}

int main() {
    uint16_t reg;
    scanf("%hx", &reg);
    printf("%u", extract_field(reg));
    return 0;
}

Solving Approach