how can i use cout<<“hello world”; without using ; at the end of the line

问题

I want to display hello world message in c++ without using semicolon. how can I do that? Is it possible? I have tried it inside if else block like

if(true) {
cout<<"hello world"

}

but it does not work like that.

回答1:

if (cout << "hello world") {}

回答2:

You can put it as the condition:

if (std::cout << "hello world") {}

回答3:

You can use if, for or while, maybe more.

if(std::cout << "Hello World") { }

while(std::cout << "Hello World" && false) { } // && false to loop only once

for(std::cout << "Hello World"; false;) { } // has semicolons, but not at the end of line ;)

Or put it on the next line:

std::cout << "Hello World 4"\
;      

来源：https://stackoverflow.com/questions/59990046/how-can-i-use-couthello-world-without-using-at-the-end-of-the-line