Bit Operations using Macros

Code

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

// Define bitwise macros here
#define set(reg,bit) (reg|=(1<<bit))
#define clear(reg,bit) (reg&=~(1<<bit))
#define toggle(reg,bit) (reg^=(1<<bit))

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    for(int bit=7;bit>=0;bit--)
    {
        if(bit==2 || bit==7)
            set(reg,bit);
        else if(bit==3)
            clear(reg,bit);
        else if(bit==5)
            toggle(reg,bit);
    }
    return reg;
}

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

Solving Approach