1. Set or Clear a Specific Bit in a Register

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

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    // Write your code here
    for(unsigned char  i=0 ; i<7 ; i++)
    {
        if( (1<< pos)&(1<<i))
        {
            if(mode == 1)
            {
              reg |= (1<<pos);
            }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;
}