Bit Operations using Macros

Code

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

// Define bitwise macros here
#define set_bit(val,pos)    (val |= (1 << pos))
#define clear_bit(val,pos)    (val &= ~(1 << pos))
#define toggle_bit(val,pos)    (val ^= (1 << pos))
uint8_t modify_register(uint8_t reg) {
    reg = set_bit(reg,2);
    reg = set_bit(reg,7);
    reg = clear_bit(reg,3);
    reg = toggle_bit(reg,5);
    return reg;
}

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

Solving Approach