operator«

Beware of the associativity of this operator. What will the following code output?

int i=0;
cout << i << " " << i++ << " " << i << "\n";

The answer is:

> 1 0 0

The reason is that operator<<() operates from right to left even though the output will be produced from left to right. The following code will produce the expected result:

int i=0;
cout << i << " ";
cout << i++ << " ";
cout << i << "\n";

The output being:

> 0 0 1