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
    uint8_t mask;
    // Tạo 1 mask bằng cách lấy 0b100 - 0b1 = 0b011 
    mask = (1 << (end -start + 1)) -1;
    reg = reg | (mask << start); 
    return reg;
}

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