Writing a Simple Program in C++ 4.3.2.

In Turbo C++ , we write a simple program as follows:-

#include<iostream.h>
#include<conio.h>

void main()
{clrscr();
int a;
cin>>a;
cout<<a;
getch();
}

But in latest C++ 4.3.2 Edition ,program is written as :-


#include<iostream>
using namespace std;
int main()
{
int a;
std::cin>>a;
std::cout<<a;
return 0;
}

• It is necessary to add  using namespace std; in the beginning of the program.
• (.h) is not written after a header file name.
• <conio.h>,<graphics.h> etc. are omitted header files in C++.
• A main function should return a value.

Or simply program could be written as:-

#include<iostream>
using namespace std;
int main()
{
int a;
cin>>a;
cout<<a;
return 0;
}