/// <summary> 
/// </summary> 
void function1(int data)
{
  int x = data;
  
  return x*(-1);
}

/// <summary> 

/// </summary> 
void function2(int data)
{
  int x = data;
  
  return x*(-1);
}

/// <summary> 
/// function A squares the data
///
/// function ended
/// </summary> 
void functionA(int data)
{
  int x = data;
  
  return x*x;
}

/// <summary> 
/// 
/// </summary> 
void functionB(int data)
{
  int x = data;
  
  return x*(-1);
}

/// <summary> 
/// </summary> 
void functionC(int data)
{
  int x = data;
  
  return x*(-1);
}

/// <summary> 
/// function d zeros the data
/// </summary> 
void functionD(int data)
{
  return 0;
}