Write a while loop that prints userNum divided by 4 (integer division) until reaching 2. Follow each number by a space. Example output for userNum = 160:

40 10 2

Note: These activities may test code with different test values. This activity will perform four tests, with userNum = 160, then with userNum = 8, then with userNum = 0, then with userNum = - 1. See "How to Use zyBooks".

Also note: If the submitted code has an infinite loop, the system will stop running the code after a few seconds, and report "Programend never reached." The system doesn't print the test case that caused the reported message.

#include

using namespace std;

int main () {

int userNum;

cin >> userNum;

/ * Your solution goes here * /

cout << endl;

return 0;

}

Answer / Explanation:

#include

using namespace std;

int main ()

{

int userNum = 0;

userNum = 20;

cout << userNum << " ";

while (userNum > 1)

{

userNum = userNum/2;

cout << userNum << " ";

}

cout << endl;

return 0;

}

However, we should note that the above codes divides properly but when it gets to 0, it will always give output as 0 instead of terminating the program.

Hence to make it terminate, we include:

while (userNum > 1)

{

cout << userNum << " ";

userNum = userNum/2;

}

The above code alternatively should be replaced with int userNum = 0;.

Also, for the sake of industry best standard and the general principle, we can say:

The general principle is:

while ()

{

/ / Use the data

/ / Change the data as the last operation in the loop.

}

A for loop provides natural placeholders for these.

for (;; )

{

/ / Use the data

}

If you were to switch to using a for loop, which I recommend, your code would be:

for (userNum = 20; userNum > 0; userNum / = 2)

{

cout << userNum << " ";