6.9 Arithmetic Operators

6.9 Arithmetic Operators

Not surprisingly, the standard operators of mathematics also apply to C++ statements, namely + (addition), − (subtraction), * (multiplication), and / (division). Additionally, parentheses () can be used to prioritize the evaluation of expressions over others. Consider the following.

• Statements that include the equality operator (=) are evaluated from right to left. The total value on the right-hand side is assigned to the variable on the left.

        //answer is 0      int answer = 0;      answer = 5 + 7 + 9 - 3      //answer is now 18 

• Variables and constants can be included in operations.

        int number1 = 5;      int number2 = 10;      //0 is assumed if no assignment provided      int Result;      Result = number1 + number2;      //Result is 15 

• Parentheses prioritize expressions.

        int number1 = 5;      int number2 = 10;      //0 is assumed if no assignment provided      int Result;      Result = (number1 + number2) * 3;      //Result is 45