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:
#include <iostream>
using namespace std;
int main()
{
int numUsers = 0;
int updateDirection = 0;
numUsers = 8;
updateDirection = 0;
if(updateDirection==1){
numUsers++;
}
else if(updateDirection==0){
numUsers--;
}
cout<<"New value is: "<< numUsers<<endl;
return 0;
}