C++入门 输出Hello World
#include <iostream>using namespace std;int main(){
cout << "Hello, world!" << endl; return 0;}它等效于
#include <iostream>using namespace std;int main(){
cout << "Hello, world! \n"; return 0;}#include <iostream>using namespace std;int main(){
cout << "Hello, world!" << endl; return 0;}它等效于
#include <iostream>using namespace std;int main(){
cout << "Hello, world! \n"; return 0;}