Set Specific Bits in a 32-bit Register

Code

#include <stdio.h>
#include <stdint.h>
uint32_t set_bits(uint32_t reg, uint8_t pos, uint8_t len) {
    // Your code here\n    
    uint32_t mask = ((1<<len)-1) << pos;
    return reg | mask;
}
    int main() {
        uint32_t reg;
        uint8_t pos, len;   
        scanf("%u %hhu %hhu", &reg, &pos, &len);
        printf("%u", set_bits(reg, pos, len));
        return 0;
    }

Solving Approach