Bit Operations using Macros

Code

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

// Define bitwise macros here
#define CLEAR(val, pos) (val & ~(1<<pos))
#define SET(val, pos) (val | (1<<pos))
#define TOGGLE(val, pos) (val ^ (1<<pos))

uint8_t modify_register(uint8_t reg) {
    reg = SET(reg, 2);
    reg = SET(reg, 7);
    reg = CLEAR(reg, 3);
    reg = TOGGLE(reg,5);
    return reg;
}

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

Solving Approach