Bit Operations using Macros

Code

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

// Define bitwise macros here
// uint8_t pos;
#define SetBit27(reg,pos) ((reg &(1<<pos)) ==0? (reg = reg |(1<<pos)) : reg= reg)
#define ClearBit3(reg,pos) (reg =reg & ~(1<<pos))
#define ToggleBit5(reg,pos) (reg = reg^(1<<pos))
uint8_t modify_register(uint8_t reg) {
    // Apply operations in order
    reg = SetBit27(reg,2);
    reg = SetBit27(reg,7);    
    reg = ClearBit3(reg,3);
    reg = ToggleBit5(reg,5);
    return reg;
}

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

Solving Approach