Which of the following statement is correct about the program given

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

#include 
 class Crackexams {  
   int x;     
   float y;    
   public:     
     Crackexams(int x) {   
       x = x;   
     }    
     Crackexams(int p = 0, int q = 10) { 
       x = p += 2;     
       y = q * 1.0f;  
     }   
     void SetValue(int &y, float z) { 
       x = y; 
       y = (int)z;    
     }    
     void Display(void) {   
       cout<< x;    
     } 
 }; 
 int main() {  
   int val = 12; 
   Crackexams objCrackexams(val);
   Crackexams objTmp();  
   objCrackexams.SetValue(val, 3.14f);   
   objCrackexams.Display();  
   return 0; 
 }

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