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Discussion :: Functions - C++

Which of the following statement is correct about the program given below?

#include 
 class Freshergate 
 {   
    int x, y, z;   
    public:    
    Freshergate(int x = 100, int y = 30, int z = 0)  
    {      
       this->x = x;   
       this->y = y;     
       this->z = z;       
       Display();     
   }   
   void Display()  
   {     
       cout" " " " int main()
 {    
    int a = 0, b = 1, c = 2;   
    int &x = ++a;    
    int &y = --b;     
    int z = c + b - -c;      
    Freshergate objGate(x, y, z);      
    return 0; 
 }