# Assume that x is a variable that has been declared as an int and been given a value.

### LANGUAGE: C++

### CHALLENGE:

Assume that x is a variable that has been declared as an int and been given a value. Assume that twice is a function that receives a single integer parameter and returns twice its value. (So if you pass 7 to twice it will return 14. Thus the expression twice(7) has the value 14.

Write an expression whose value is eight times that of x without using the standard C arithmetic operators (*,+, etc.). Instead, use calls to twice to accomplish this.

In this exercise you must write this as a single expression– you must not write any statements. Also, you may only use the twice() function– no other functions or operators.

### SOLUTION:

twice(twice(twice(x)))