C++

#include <iostream>
using namespace std;

int main() {
cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!!
return 0;
}

 

#include <iostream>
using namespace std;

int main()
{
int a,b,sum;
cin>>a>>b;
sum=a+b;
cout<<"a+b="<<sum<<endl;
system("pause");   //停留
return 0;
}