20. Clear Specific Bits in a 32-bit Register

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

uint32_t clear_bits(uint32_t reg, uint8_t pos, uint8_t len) {
    // Your code here
    uint8_t end_bit = len + pos - 1;
    for (int i = 0; i < 32; i++) {
        if ((i > (pos-1)) & (i <= end_bit)) {
            reg &= (~(1 << i));
        }
    }

    return reg;
}

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;
}