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
    unsigned char result = 0;
    int mask = 0;
    if ((mode == 0 || mode == 1) && (pos >=0 && pos <=7))
{
      if(mode == 1){
      mask =  (1 << pos);
      reg |= mask;
                 }
else if (mode == 0){   
      mask = ~(1 << pos);
      reg &= mask; 
}
result = reg;
    }
    

return result;
}

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