Bit Operations using Macros

Code

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

// Define bitwise macros here
#define set_reg(reg,pos)   (reg|=1<<(pos));
#define clear_reg(reg,pos)   (reg&=~(1<<(pos)));
#define toggle_reg(reg,pos)   (reg^=1<<(pos));

uint8_t modify_register(uint8_t reg) {

    // Apply operations in order

    set_reg(reg,2);
     set_reg(reg,7);
    clear_reg(reg,3);
    toggle_reg(reg,5);

    return reg;
}

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

Solving Approach