Home > Blogs > 30 C++ Tips in 30 Days: Tip # 11 displaying literal boolean values
By default, iostream objects display bool variables as 0 and 1. Learn how to override this setting.
Inserting the format flag boolalpha to the object stream will force iostream objects to display the literal names instead:
#include
<iostream>
using namespace std;
int main()
{
bool b = true;
cout<<b; // default setting; output 1
cout<<boolalpha; //henceforth,display 'true' and 'false'
cout<<b;
cout<<!b;
}
The symbols true and false are locale-dependent, so in a different locale they will be replaced with that locale's equivalents.
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Effective Java, 3rd Edition