[Software Technologies] PHP - 4. Product of 3 Numbers
4.Product of 3 Numbers
You are given a number num1, num2 and num3. Write a PHP script that finds if num1 * num2 * num3 (the product) is negative or positive. Try to do this WITHOUT multiplying the 3 numbers.
The input comes as parameters named num1, num2 and num3.
Examples
Parameters name |
Input |
Output |
|
Input |
Output |
|
Input |
Output |
num1 |
2 |
Negative |
|
5 |
Positive |
-3 |
Positive |
|
num2 |
3 |
|
4 |
-4 |
||||
num3 |
-1 |
|
3 |
5 |
Hints
- Count the negative numbers. If they are odd number, the result will be negative, otherwise à positive.
- Special case: one of the numbers is 0 à the product is positive.
Ето ми го решението http://pastebin.com/xpDbutYK
Не мога да докарам специалния случай. Някой идеи ?
Мерси.
А знаете ли с in_array защо не работи ? Явно не го използвам както трябва.