Set or Clear a Specific Bit in a Register

Code

#include <stdio.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    // Write your code here
    int mod_reg = (int)reg;
    if(mode == 0){ // clear the bit
        mod_reg &= ~(1 << pos);
        return mod_reg;

    }
    else if(mode == 1){ // set the bit
        mod_reg |= (1 << pos);
        return mod_reg;
    }
    else{
        printf("Invalid Mode!!");
        return -1;
    }


}

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