Saying "Hello World!"
The obligatory first program
PRE C++20 method
#include <iostream>
using namespace std;
int main()
{
cout << "Hello World!" << endl;
return 0;
}C++20 and newer method
import <iostream>;
using namespace std;
int main()
{
cout << "Hello World!" << endl;
return 0;
}| Restriction | |
|---|---|
C++20 Compiler Support
At the moment some features of C++20 are not yet available in the
big 3 compilers (GCC, CLANG, and MSVC)
If you use the GNU Compiler Collection, the only version that
supports C++20 modules is gcc-11 (exerimental at the
moment).
| |
Both version compile to the same program:Figure 1. Hello World!
