Set Multiple Bits in 8-bit Register

Code

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

// uint8_t setMulpipleBits(uint8_t reg, int start, int end){
//     for(int i = start; i <= end; i++){
//         reg |= (1 << i);
//     }
//     return reg;
// }

uint8_t setMulpipleBits(uint8_t reg, int start, int end){
    uint8_t setValue = 0x00;
    for(int i = start; i <= end; i++){
        setValue |= (1 << i);
        reg |= setValue;
    }
    return reg;
}


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

Solving Approach