What is template in CPP

Ans:- A C++ template is an advanced feature of C++ that allows us to define the Generic class and Generic function. So if you provide the Generic Programming. Generic Programming is a technique where Generic type uses a Parameter (), an Algorithm. So we can work for a  variety of Datatype. What is template in CPP

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A templates can be present into two way:-
1. Function Templates
2. Class Templates

1. The function of Templates.

:-We can define a template of the function. for ex:- If you will have a function that you can create different datatypes as an argument in a function. So by using function templates, we can refresh the Function Overloading.

Advantages of Function Templates.

• The generic function we the concept of function Templates.
• The generic function defined a set of Operators that can be applied to the various datatype.
• The type of data that a function will operate on remains on the type of data pass as a Parameter.
•  generic Function can be created by Templates Keyword. Templates what function will do.

Syntax:-
template<class T>return type frame(parameter)
{
//body of the function
}

What is template in C++

Example through Function Templates:-

#include<iostream.h>
#include<conio.h>
void sum (T a. T b)
{
cout <<“sum=”<<( a+b )<< endl;
}
void main()
{
float n1=200.10, n2=300.20;
long k1=500, k2=600;
int a=10,b=20;

cout<<“sum=”<<sum(a,b)<<endl;
cout<<“sum=”<<sum(n1,n2)<<endl;
cout<<“sum=”<<sum(k1,k2)<<endl;

getch();
}

Output:- sum=500.30

              sum=1100

              sum=30

(In Float, Long and Integer)

CPP template

2. Class Templates:-

The class template also is defined similarly to the function template when the class templates concept function.
templates are known as the generic class.

Syntax:-
template<classT>
class < Cname>
{
private:
T var1;
T var2;
public:
Cname (T X)
{
};
void main()
{
Cname<int> obj(100);
Cname<char>obj('a');

Template in CPP

Example of Class Template in C++ :-

#include<iostream.h>
#include<conio.h>
template<class T>
class test
{
private:
T a;
public:
test (T X)
{
a=X;
}
void show()
{
cout<<"a="<<a<<endl;
}
};
void main()
{
test <int>t1(100);
test <char>t2('a');
test <float>t3(600.20);
t1.show();
t2.show();
t3.show();

getch();

}

Output:-  100

a

600,20

C++ template function

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