Set or Clear a Specific Bit in a Register

Code

#include <stdio.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) {

    // If set to 1 mode, 
    if (mode == 1) reg |= (1<<pos);
    // If set to 0 mode,
    else if (mode == 0) reg &= ~(1<<pos);

    return reg;
}

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

First, I checked which mode was chosen by the user. Then, I set the bit and used the appropriate bitwise operator according to the mode. 

I analyzed ways to reduce the code and settled on this fairly simplistic version. I feel like there are more compact and neater ways to write the code out but the version I settled on is simple and readable.