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C++ is different from Java in that C++ type bool is actually equivalent to type int. Constant true is 1 and constant false is 0.
It is considered good practice, though, to write true and false in your program for boolean values rather than 1 and 0. The coding standards for this course require you to do that.
Whenever an integer value is tested to see whether it is true of false, 0 is considered to be false and all other integers are considered be true. For example, in
if(4) { … }4 is treated like true. But don't do that in your program. The standards for this course require you to test values that are true or false, with rare exceptions.
Operators !, && and || always yield either true or false. For example, expression 3 && -2 yields true.
That is what C++ does. The coding standards for this course require that boolean operators only be used when their operands are either true or false. For example, expression 1 || 2 violates that standard.
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