CODEWITHSUNDEEP
c++templatesvector
ZigZagZebra
ZigZagZebra

Reputation: 1459

vector of template with two types

I read related posts but still cannot figure it out. In my .h file, I defined a template class:

template <typename P, typename V>
class Item {
 public:
    P priority;
    V value;
    Item(P priority, V value): priority(priority), value(value){}
};

In my main function, I tried to make a vector of Items with specific type. 

Item<int, string> Item1(18, "string 1");
Item<int, string> Item2(16, "string 2");
Item<int, string> Item3(12, "string 3");
Item<int, string> Item[3] = {Item1, Item2, Item3}
vector<Item<int, string> > Items(Item, Item + 3);

But I keep getting compile error saying:

expected '(' for function-style cast or type construction
vector<Item<int, string> > Items(Item, Item + 9);
            ~~~^

Upvotes: 1

Views: 485

Answers (1)

ashiquzzaman33
ashiquzzaman33

Reputation: 5741

Here's working code

#include<iostream>
#include<vector>
using namespace std;
template <typename P, typename V>
class Item
{
public:
    P priority;
    V value;
    Item(P priority, V value): priority(priority), value(value) {}
};
int main()
{
    Item<int, string> Item1(18, "string 1");
    Item<int, string> Item2(16, "string 2");
    Item<int, string> Item3(12, "string 3");
    Item<int, string> ItemL[3] = {Item1, Item2, Item3}; 
    vector<Item<int, string> > Items(ItemL, ItemL+3);
}

You have several problem:

  1. Semicolon missing after Item<int, string> Item[3] = {Item1, Item2, Item3} line
  2. In Item<int, string> Item[3] line Your class name Item and array of Item named Item ambiguous. So rename it other name, I rename it as ItemL

Upvotes: 1

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