Bit Operations using Macros

Code

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

// Define bitwise macros here
#define SHIFT_POS(POS)     (1<<POS)
#define SET_BIT(REG,POS)   REG |= SHIFT_POS(POS)
#define CLR_BIT(REG,POS)   REG &= ~SHIFT_POS(POS)
#define TOGL_BIT(REG,POS)  REG ^= SHIFT_POS(POS)

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

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

Solving Approach