Bit Operations using Macros

Code

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

#define pos_2 2
#define pos_3 3
#define pos_5 5
#define pos_7 7
#define set_bit(reg,pos) (reg|(1<<pos))
#define clear_bit(reg,pos) (reg&(~(1<<pos)))
#define toggle_bit(reg,pos) (reg^(1<<pos))


uint8_t modify_register(uint8_t reg) {
    reg=set_bit(reg,pos_2);//set bit 2
    reg=set_bit(reg,pos_7);//set bit 7
    reg=clear_bit(reg,pos_3);//clear bit 3
    reg=toggle_bit(reg,pos_5);//toggle bit 5
    return reg;
}

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

Solving Approach