Set or Clear a Specific Bit in a Register

Code

#include <stdio.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) 
{
    for(int i=7;i>=0;i--)
    {
        if(mode==1)
        {
            if(pos==i)
            {
                reg |=(1<<pos);
            }
        }
        else if(mode==0)
        {
            if(pos==i)
            {
                reg &=~(1<<pos);
            }
        }
    }
    return reg;
}

int main() {
    unsigned char reg;
    int pos, mode;
    scanf("%hhu %d %d", &reg, &pos, &mode);
    if(pos<=7)
    {
        printf("%d", modifyBit(reg, pos, mode));
    }
    else
    {
        printf("Position should be less than 7");
    }
    return 0;
}

Solving Approach