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

    //create a series of ones upto len
    uint32_t mask = (1U << len)-1;

    //shift the ones to the position bits
    mask = mask << pos;

    //return the and of register and the inverted mask , make all the ones prositioned to 0
    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;
}