Clear Specific Bits in a 32-bit Register

sCode

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

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

    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;
}

Solving Approach

Create a mask of all 1s

turn off the bits one by one from the first to the last by exclusive bitwise OR with a moving 1

Bitwise AND the mask with the register