Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET_BIT(r, n)   r |= (1 << n)
#define CLR_BIT(r, n)   r &=~ (1 << n)
#define TOG_BIT(r, n)   r ^= (1 << n)


uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    SET_BIT(reg, 2);
    SET_BIT(reg, 7);
    CLR_BIT(reg, 3);
    TOG_BIT(reg, 5);
    return reg;
}

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

Solving Approach