CODEWITHSUNDEEP
c++
Micheal Obiora
Micheal Obiora

Reputation: 17

Using relational operators in C++

am just learning C++ programming and my problem is that am trying to compare more than one variables and is not working. This is what I typed : if ( a > b > c).

Upvotes: 1

Views: 119

Answers (2)

vsoftco
vsoftco

Reputation: 56557

It doesn't work like this, as the first expression a > b evaluates to a boolean, which is converted (because of the comparison with c) to either 0 or 1, depending on its truth value. You then attempt to compare it with c, which is not what you want. Use

if ( (a > b) && (b > c) )

instead. This way you compute the logical AND of two booleans, and if both are true, then the mathematical statement a > b > c is true (by transitivity).

If you compile with all warnings on, the compiler will (probably) warn you. At least g++ is saying:

warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]

Upvotes: 4

Nakib
Nakib

Reputation: 4703

You have to seperate both conditions via AND(&&) Operator

if ( (a>b) && (b > c) ){
   //code
}

Upvotes: 3

Related Questions