Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SET_BIT(n, pos)         (n|=(1U<<pos))          
#define CLEAR_BIT(n, pos)       (n&=~(1U<<pos))
#define TOGGLE_BIT(n, pos)      (n^=(1U<<pos))

uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    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