Bit Operations using Macros

Code

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

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


uint8_t modify_register(uint8_t reg) {
    
    SET_BIT(reg, 2);
    SET_BIT(reg, 7);

    // 2. Clear bit 3
    CLEAR_BIT(reg, 3);

    // 3. Toggle bit 5
    TOGGLE_BIT(reg, 5);
    
    return reg;
}

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

Solving Approach

 

 

 

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Input

0

Expected Output

164