Set Specific Bits in a 32-bit Register

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

uint32_t set_bits(uint32_t reg, uint8_t pos, uint8_t len) {
    for(uint32_t i = 0; i<len; i++){
        reg |= (1<<(pos+i));
    }
    return reg;
}

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;
}

we used 'for' loop to set len no of bits

the pos inside the loop is used as an offset to tell the initial bit to the program