Set Multiple Bits in 8-bit Register

Code

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

uint8_t set_range(uint8_t reg, uint8_t start, uint8_t end) {
    for ( uint8_t i = start ; i <= end ; i++){
          reg |= (1 << i);
        }
    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;
}

Solving Approach

• Loop from start to end.
• For each bit position i, create a mask: 1 << i.
• Set the bit in the register: reg |= mask.
• Return the updated register.