Bit Operations using Macros

Code

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

#define SET_BIT(r,b)  ((r)|=(1<<(b)))
#define CLEAR_BIT(r,b)  ((r)&=~(1<<(b)))
#define TOGGLE_BIT(r,b)  ((r)^=(1<<(b)))


uint8_t modify_register(uint8_t reg) {
    SET_BIT(reg, 2);     
    SET_BIT(reg, 7);      
    CLEAR_BIT(reg, 3);    
    TOGGLE_BIT(reg, 5);
    return reg;
}

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

Solving Approach