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