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
    // Solution 1  My own logic
 /* for(uint32_t i=0;i<len;i++)
    {
        reg |= (1U<<(pos+i));
    }
    return reg;//*/

    //Solution 2 // mamu logic
    if(len == 0 || len >= 32)
        return reg;
    uint32_t mask = (((1U << len) - 1U) << 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;
}