CPP

c++ template function

template <class T>
void swap(T & lhs, T & rhs)
{
 T tmp = lhs;
 lhs = rhs;
 rhs = tmp;
}

C++ template function

/*
C++ template functions are an alternamive way to write a function that
can take different data types. C++ Template functions are only one
function, so if you need to make a change, then it only has to be done
once. Here is an example of a 'get_doubled' templated function:
*/

#include <iostream>
using std::cout;

template <typename T> // Now, T is a type of variable, for this scope:
void say_something(T input) {
  cout << input << "
";
}

int main(void) {
  say_something(45); // Uses a int
  say_something("Hello"); // Uses a string
  say_something(90.5); // Uses a float/double
  return 0;
}

C++ Class Template Declaration

template <class T>
class className {
  private:
    T var;
    ... .. ...
  public:
    T functionName(T arg);
    ... .. ...
};

c++ template function in class

class Object
{
public:
    template<typename T>
    void function(T value){}
};

Function Template in c++

// function template in c++
#include <iostream>
using namespace std;
float funAvg(int a, int b){
    float avg = (a+b)/2.0;
    return avg;
}
float funAvg2(int a, float b){
    float avg2 = (a+b)/2.0;
    return avg2;
}

//function template in c++

template<class T1 , class T2>
float fun(T1 a, T2 b){
    float avg2 = (a+b)/2.0;
    return avg2;
}

int main(){
 
    float a;
    a = funAvg(22 , 7);
    printf("The average of these number is %.3f ",a);
    cout<<endl;
    float a1;
    a1 = funAvg2(11 , 8.6);
    printf("The average of these number is %.3f ",a1);
    cout<<endl;
    // float T;
    // T = fun(11 , 8.6f);
    // printf("The average of these number is %.3f ",T);
    // cout<<endl;
    // ---------------------function template in c++-----------------
    float T;
    T = fun(11 , 98);
    printf("The average of these number is %.3f ",T);


    return 0;
}

template function in class c++

class Object
{
public:
    template<class T>
    void DoX(){}
};