C++
cin>>"nihao";
cout<<"nihao"<<endl;
C#
System.Console.ReadLine()
System.Console.WriteLine("nihao")
python
input("nihao")
print("nihao")
C++
cin>>"nihao";
cout<<"nihao"<<endl;
C#
System.Console.ReadLine()
System.Console.WriteLine("nihao")
python
input("nihao")
print("nihao")