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Another struct question

khal (85)
This my .h
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 private:
 struct test
    {
        Key obj;
	vector<Value> contain;

        test( const Key & e = Key( ), const Value & a = Value())
	{
		obj= e;
		contain.push_back(a);
	}
          
    };
    vector<test> array;


I am unclear of how to print or access the data in contain. I know for obj I would have to use 
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for(int i = 0; i < array.size(); i++)
cout << array[i].obj;

could someone help me out?
Thank You
vlad from moscow (6539)
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 private:
 struct test
    {
        Key obj;
	vector<Value> contain;

        test( const Key & e = Key( ), const Value & a = Value())
	{
		obj= e;
		contain.push_back(a);
	}
          
    };
    vector<test> array;


In the code you showed array has no elements. Let assume that you added some elements to array.

for ( int i = 0; i < 10; i++ ) array.push_back( test() );

Then you can output contain of each element in array.

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for ( std::vector<test>::size_type i = 0; i < array.size(); i++ )
{
   for ( std::vector<Value>::size_type j = 0; j < array[i].contain.size(); j++ )
   {
      std::cout << array[i].contain[j] << std::endl;
   }
   std::cout << std::endl;
}


Statement std::cout << array[i].contain[j] << std::endl; will be correct if there is overload operator << for type Value.

vlad from moscow (6539)
Also take into account that statement

vector<test> array;

shall be removed from the header and placed in a module.

khal (85)
I have not learned std::vector<test>::size_type i = 0; so I can't use it in the assignment. I tried int i = 0; but got alot of errors?
vlad from moscow (6539)
You may change
std::vector<test>::size_type i = 0;
to
unsigned int i = 0;
khal (85)
I took out the scope resolution operator because I include namespace but the following still produce error.

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for ( vector<test>::unsigned int i  = 0; i < array.size(); i++ )
{
	  for ( vector<Value>::unsigned int j  = 0; j < array[i].contain.size(); j++ )
	  {
		 cout << array[i].contain[j] << endl;
	  }
		   cout<< endl;
}


Last edited on
vlad from moscow (6539)
Show error messages.
I am sorry. You shall write


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for ( unsigned int i  = 0; i < array.size(); i++ )
{
	  for ( unsigned int j  = 0; j < array[i].contain.size(); j++ )
	  {
		 cout << array[i].contain[j] << endl;
	  }
		   cout<< endl;
}
Last edited on
khal (85)
Okay that works. Thanks for being so helpful and patience, I really appreciate it
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