Clear Specific Bits in a 32-bit Register

Code

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

uint32_t clear_bits(uint32_t reg, uint8_t pos, uint8_t len) {
    
    // single line code
    reg = reg & (~(((1<<len)-1)<<pos));
    
    //multi line code for understanding
    /*uint32_t mask = ((1<<len)-1);
    mask = mask << pos;
    mask = ~mask;
    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