Bit Operations using Macros

Code

#include <stdio.h>
#include <stdint.h>
#define SETBIT(WORD,BIT) (WORD|=(1<<BIT))
#define CLRBIT(WORD,BIT) (WORD&=~(1<<BIT))
#define TGLBIT(WORD,BIT) (WORD^=(1<<BIT))

uint8_t modify_register(uint8_t reg) 
{
    SETBIT(reg,2);
    SETBIT(reg,7);
    CLRBIT(reg,3);
    TGLBIT(reg,5);
    return reg;
}

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

Solving Approach