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try catch exception

MaxGreen (115)
Lads, I am trying to do HW in a specific way using the exception library.

task: Considering that var. A, B, C will randomly receive values from 0-10, I have to display the value nr. and variable,
if:
A=1,3,5;
B=2,7;
C=rand()%7-4;

The problem with my code is that when variable C receives values which are included in the range of variable A (3,4,5) it reads variable A as an error as well with same value as C, though A received different values than C. ( and the situation is vice-versa).


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 class ERR 
 {
 	
     int value; 
     
    public:
    	
      ERR(int value=NULL){  this->value = value;   }
      
     void what()
  { 
  
  switch(this->value)
  {
    case 1:  cout<<"Code error A ["<<this->value<<"]"  <<endl; break; 
    case 3:  cout<<"Code error A ["<<this->value<<"]"  <<endl; break; 
    case 5:  cout<<"Code error A ["<<this->value<<"]"  <<endl; break; 
    
    case 2:  cout<<"Code error B ["<<this->value<<"]"  <<endl; break;
    case 7:  cout<<"Code error B ["<<this->value<<"]"  <<endl; break;
    
  }
  
  }
  
  void what1()
  { 
  
  switch(this->value)
  {
    
    case 3:  cout<<"Code error C ["<<this->value<<"]"  <<endl; break;
    case 4:  cout<<"Code error C ["<<this->value<<"]"  <<endl; break;
    case 5:  cout<<"Code error C ["<<this->value<<"]"  <<endl; break;
    case 6:  cout<<"Code error C ["<<this->value<<"]"  <<endl; break;
    case 7:  cout<<"Code error C ["<<this->value<<"]"  <<endl; break;
  }
  
  }
  
  
 };
 
 
 
int main()
{ 
    srand(time(0));
    
    int A,B,C,R;
   
    
   try
   {
   	
   	A=rand()%11;
   	B=rand()%11;
   	C=rand()%11;
   	
   	R=A+B-C; 
	   
	cout<<"A="<<A << " B="<<B << " C="<<C << " R= "<<R<<endl;
   	
   	if(A==1) throw ERR(1);
   	if(A==3) throw ERR(3);
   	if(A==5) throw ERR(5);
   	
   	if(B==2) throw ERR(2);
	if(B==7) throw ERR(7);

   	if(C==3) throw ERR(3);
   	if(C==4) throw ERR(4);
   	if(C==5) throw ERR(5);
   	if(C==6) throw ERR(6);
   	if(C==7) throw ERR(7);
 
   }
   
   catch(ERR&e)
   {
     e.what();
     e.what1();
   }
   
 return 0;
}
coder777 (8444)
The class ERR does not make any differences when it comes to the value, where 3 and 5 do overlapp.

What you can do to make the difference between A and C is e.g. multiply the value of A with 100. Then the switch would look like:
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     void what()
  { 
  
  switch(this->value)
  {
    case 100:  cout<<"Code error A [1]"  <<endl; break; 
...
MaxGreen (115)
@coder777, thanks so much, I could identify the problem however couldn't think out a simple solution to it!
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