How do you concatenate two strings? [duplicate]

This question already has answers here: Closed 1开发者_开发问答1 years ago.

Possible Duplicate:

How do I concatenate multiple C++ strings on one line?

How would I take:

string test1 = "Hello ";
string test2 = "World!";

and concatenate them to make one string?

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How about

string test3 = test1 + test2;

Or maybe

test1.append(test2);

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You could do this:

string test3 = test1 + test2;

Or if you want to add more string literals, then :

string test3 = test1 + test2 + " Bye bye World!"; //ok

or, if you want to add it in the beginning, then:

string test3 = "Bye bye World!" + test1 + test2; //ok