function overloading in c++

- 
// functionoverloading//
 #include <iostream>
 using namespace std;
 void display ( ) //function with no arguments
{
  int a = 3;
  cout << a << endl;
}
void display (int a ) //function with one integer argument
{
  cout << a << endl;
}
void display (double a ) //function with one floating argument
{
   cout << a << endl;
}
void display(int a, float b) //function with one integer and one floating arguments
{
   cout<< a << " , " << b << endl;
}

int main()
{
  display(); //function call with no arguments
  display(5); //function call with one integer argument
  display(2.3); //function call with one floating argument
  display(5,4.0); //function call with one integer and one floating arguments
  return 0;
 } //end of program
 
 
 Output
3
5
2.3
5 , 4
  

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