Set or Clear a Specific Bit in a Register

Code

#include <stdio.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    unsigned char data = reg;
    // Nếu set bit thì dùng toán tử OR, clear bit thì AND
    if (mode == 1)
        data |= (1 << pos);         // Set bit
    else
        data &= ~(1 << pos);        // Clear bit
    
    return data;
}

int main() {
    unsigned char reg;
    int pos, mode;
    scanf("%hhu %d %d", &reg, &pos, &mode);
    printf("%d", modifyBit(reg, pos, mode));
    return 0;
}

Solving Approach