Templates Program Examples

Example : A Template Program Examples in C++ to show Function Template.

#include <iostream>

template<typename T>

T maxval(T a, T b) 
{
  return a > b ? a : b;
}

int main() {
  int a = 100, b = 50;
  double x = 113.414, y = 210.071;

  std::cout << "The larger value is = " << maxval(a, b) << std::endl;
  std::cout << "The larger value is = " << maxval(x, y) << std::endl;

  return 0;
}

Output:
The larger value is = 100
The larger value is = 210.071

-----------  OR  -----------

#include <iostream>  
using namespace std;
  
template<class T> 

T addition(T a,T b)  //same functioning T addition(T &a,T &b).
{  
    T result = a+b;  
    return result;  
      
}  
int main()  
{  
  int x =200;  
  int y =30;  
  float p = 20.34;  
  float q = 100.02;  
  cout<<"Addition of x and y is :"<<addition(x,y);  
  cout<<'\n';  
  cout<<"Addition of p and q is :"<<addition(p,q);  
  return 0;  
}  

Output:
Addition of x and y is :230
Addition of p and q is :120.36

--------  OR  --------

#include <iostream>  
using namespace std;
  
template<class A> 

void Display(A a)  
{  
    std::cout << "Value of a is = : " <<a<< std::endl;     
}  
  
int main()  
{  
   Display(105);  
   
   return 0;  
}  

Output:
Value of a is = : 105

----------  OR  ----------

#include <iostream>  
using namespace std;
  
template<class A,class B> 

void Display(A a, B b)  
{  
    std::cout << "Value of a is = : " <<a<< std::endl;  
    std::cout << "Value of b is = : " <<b<< std::endl;  
}  
  
int main()  
{  
   Display(105,102.003);  
   
   return 0;  
}  

Output:
Value of a is = : 105
Value of b is = : 102.003

---------  OR  ---------

#include <iostream>  
using namespace std;
  
template<class A> 

void Display(A a)  
{  
    std::cout << "Value of a is = : " <<a<< std::endl;  
} 

template<class A,class B> 

void Display(A a, B b)  
{  
    std::cout << "Value of a is = : " <<a<< std::endl;  
    std::cout << "Value of b is = : " <<b<< std::endl;  
}  
  
int main()  
{  
    Display(410.037); 
    Display(450,52.003);  
   
    return 0;  
}  

Output:
Value of a is = : 410.037
Value of a is = : 450
Value of b is = : 52.003

Example : A Template Program Examples in C++ to show Class Template.

#include <iostream>  
using namespace std;
  
template<class T>  

class A   
{  
    public:  
    T num1 = 15.5;  
    T num2 = 35.2;
		  
    void addition()  
    {  
        //cout << "Addition of two no. is = : " << num1+num2;
		
	T result;
	result = num1+num2;
	cout<<"Addition of two no. is = : " <<result<<endl;  
    }      
};  
  
int main()  
{  
    A <float> obj1;    //<float> is template arguments.    
    obj1.addition();
	
    A <int> obj2;    //<int> is template arguments.    
    obj2.addition();
  
    return 0;  
}  

Output:
Addition of two no. is = : 50.7
Addition of two no. is = : 50

----------  OR  -----------

#include <iostream>  
using namespace std;
	  
template<class T1, class T2>
	  
  class A   
    {  
      T1 m;  
      T2 n;
			  
      public:  
      A(T1 x,T2 y)  
       	{  
         m = x;  
         n = y;  
      	}  
      void display()  
        {  
          cout << "Two values are : "<<m<<" "<<n<<endl;  
        }  
    };  
  
  int main()  
     {  
      A<int,float> obj1(54,60.05);	  
      obj1.display(); 
      
      A<float,int> obj2(54,60.05);
      obj2.display();
    
      return 0;  
     }  

Output:
Two values are : 54 60.05
Two values are : 54 60

--------  OR  --------

#include <iostream>  
using namespace std;
  
template<class T, int size>
  
class A   
{  
    public:  
    T arr[size];
		  
    void input()  
    {  
      int x = 100;  
      for (int j=0;j<size;j++)  
      {  
        arr[j] = x; 
	x++;             
      }  
    }  
      
    void display()  
    {  
      for(int j=0;j<size;j++)  
      {  
        std::cout << arr[j] << " ";  
      }  
    }  
}; 
 
int main()  
{  
    A<int,10> obj; 
		 
    obj.input();  
    obj.display();
		  
    return 0;  
}  

Output:
100 101 102 103 104 105 106 107 108 109