20. Clear Specific Bits in a 32-bit Register

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

uint32_t clear_bits(uint32_t reg, uint8_t pos, uint8_t len) {
    // Your code here
    uint32_t mask = 0;
    for(uint8_t i=pos; i < (pos+len);i++){
        mask |= (1 << i);
    }
    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;
}