20. Clear Specific Bits in a 32-bit Register

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

uint32_t createMask(uint8_t pos, uint8_t len)
{
    uint32_t mask = 0;
    for(uint8_t i = 0; i < len; i++)
    {
        mask |= (1 << (pos+i));
    }
    return mask;
}

uint32_t clear_bits(uint32_t reg, uint8_t pos, uint8_t len) {
    // Your code here
    uint32_t mask = createMask(pos, len);
    return (reg & ~(mask));
}

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