Error with implement map within template c++ - c++

Question

I need to use a map with various type within es int,int or char,int or char,char....
This is my c++ code:
#include <iostream>
#include<map>
using namespace std;
template< class A, class B >
class MyClass {
private:
std::map<A,B> DatMap;
public:
MyClass<K,T>(){
DatMap = 0;
}
~MyClass(){
delete DatMap;
}
void DatInsert( A k ,B v ) {
DatMap.insert( std::pair<A,B>( k, v) );
}
};
int main(){
DatMap<int,int> datmap1();
diz1.DatInsert();
}
I found this error on: diz1.DatInsert(); line
the error is:
error: request for member ‘DatInsert’ in ‘datmap1’, which is of non-class type ‘DatMap<int, int>()’|
What am I doing wrong?

Answer 1

This is a function declaration:
// functon datamap1, returns DatMap<int, int>
DatMap<int,int> datmap1();
You need
DatMap<int,int> datmap1;
Alternatively, this syntax is valid since C++11
DatMap<int,int> datmap1{};

Answer 2

Vlad and Jauncho make good points but have both missed another error
DatMap<int,int> datmap1(); isn't valid also because there is no public type DatMap exposed. The class is MyClass
You should be saying:
MyClass<int,int> datmap1; // or datmap1{};

Answer 3

There are several errors in the code.
For example identifiers K and T used in this code snippet
MyClass<K,T>(){
DatMap = 0;
}
are undefined. Also the assignment DataMap by zero is invalid.
You shall not delete DatMap in destructor
~MyClass(){
delete DatMap;
}
because DatMap is not a pointer.
These both statements in main
DatMap<int,int> datmap1();
diz1.DatInsert();
are invalid. The first one is a declaration of a function that shall not be compiled. And the second statement contains call of member function DatInsert without arguments. You defined the function as having two parameters
void DatInsert(A k ,B v){
DatMap.insert(std::pair<A,B>(k,v));
}
so you need to provide two arguments.