Answer:
if(updateDirection==1){
numUsers++;
}
else if(updateDirection==0){
numUsers--;
}
Explanation:
The if and else if conditional statement above accomplishes this.
if the first condition is true (updateDirection==1), numUsers is increemented by 1 (numUsers++)
else if the second condition is true (updateDirection==0), numUsers is decreemented by 1 (numUsers--)
See a complete C++ code below:
<em>#include <iostream></em>
<em>using namespace std;</em>
<em>int main()</em>
<em>{</em>
<em>int numUsers = 0;</em>
<em>int updateDirection = 0;</em>
<em />
<em>numUsers = 8;</em>
<em>updateDirection = 0;</em>
<em />
<em>if(updateDirection==1){</em>
<em> numUsers++;</em>
<em>}</em>
<em>else if(updateDirection==0){</em>
<em> numUsers--;</em>
<em>}</em>
<em>cout<<"New value is: "<< numUsers<<endl;</em>
<em>return 0;</em>
<em>}</em>