一种是用C++本身代码#includeusing namespace std;int main(){ cout<<"HELLO WORLD"<另一种是用C++里兼容的C#include(#include)(using namespace std;)int main(){printf("HELLO WORLD\n");//c函数printfreturn 0;}
#includeusing namespace std;int main(){ cout<<"HELLO WORLD"< return 0;}
