What's the difference between “ABC” and string(“ABC”) in C++?

Question

I have the following code snippet...

for(char c: "ABC") cout << c << endl;
for(char c: string("ABC")) cout << c << endl;

The second one works fine. But's first one behaves different in different environment. What's the difference between these two?

Answer 1

"ABC" is a string literal with type const char[4] , ie an array containing 4 char s including the terminating null character '\\0' . for(char c: "ABC") cout << c << endl; would output all the 4 elements.

string("ABC") is of type std::string constructed to contain only 3 elements, for(char c: string("ABC")) cout << c << endl; would output the 3 elements, 'A' , 'B' , and 'C' .