Bit Operations using Macros

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

#define SET_BIT(reg, pos) (((1<<pos) | reg))
#define CLEAR_BIT(reg, pos) ((reg & ~(1<<pos)))
#define TOGGLE_BIT(reg, pos) ((1<<pos ^ reg))

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

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