What is class template

Question

class template

Answer 1

A class template allows you to use the class accordingly for different types.

It is just an extension of function templates to class methods...

Eg -

template<class T>
class Ex{
private:
T arg1,arg2
public:
Ex(T a,T b):arg1(a),arg2(b){}}
//in main()
Ex<double>a(2,2),b(4,5);
// Saved a,b as objects of type double
// Can also call Ex<int>c(2,2);

Such classes prove useful in Matrices, Complex Numbers, Comparisions, STL Containers like Vectors, Maps, Sets, etc....

Answer 2

Basically, a Template allows you to use a particular function for more than one data type.

Thus now if you use templates in a max() function, it will return the greater of strings, integers, doubles and chars, and even any new classes you create...

Templates thus are an adavncement to function overloading, just done in a single statement as compared to the earlier way...

Similarly, using a template in a class will allow you to use methods inside it with different data types...

Like the max method in a class for doubles, strings, integers, other classes, etc

Answer 3

template allows you use different data types.

Answer 4

any simpler explaination