18. Set Multiple Bits in 8-bit Register

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

uint8_t set_range(uint8_t reg, uint8_t start, uint8_t end) {
    // Your code here
    char mask = 0;
    mask |= 1 << start;
    for (int i = 0; i < end - start + 1; i++)
    {
        mask |= 1 << start + i;
    }
    return (reg | mask);
}

int main() {
    uint8_t reg, start, end;
    scanf("%hhu %hhu %hhu", &reg, &start, &end);
    printf("%u", set_range(reg, start, end));
    return 0;
}