int uminus(int x) {
  return -x;
}

char uminus(char x) {
  return -x;
}

float uminus(float x) {
  return -x;
}

double uminus(double x) {
  return -x;
}

char minus(char a, char b) {
  return a - b;
}

char fourty2minusA(char a) {
  return 42 - a;
}

char zeroMinusA(char a) {
  return 0 - a;
}