Expression Result Unused Greedy Algorithm

Question

I have run this program and get the error expression result unused. I may be doing something simple wrong, but I have spent the day trying to figure it out to no avail. Any help

Answer 1

    if (x >= 25)
    {
        x - 25;               // This accomplishes nothing
        y = y + 1;
    }
    if (x >= 10 && x < 25)
    {
        x - 10;               // This accomplishes nothing
    }   y = y + 1;
    if (x >= 5 && x < 10)
    {
        x - 5;                // This accomplishes  nothing
    }   y = y + 1;
    if (x >= 1 && x < 5)
    {
        x - 1;                // This accomplishes nothing
        y= y + 1;
    }

In each of those lines you're subtracting a number from x, but you're doing nothing with the result. If you're trying to update x with the result, you need to do just like you're doing with y, and put x = in front of the expression.

So if you want x to go down by 25, you should write:

x = x - 25; 

Alternatively, you can write the shorthand:

x -= 25;     // Note the equal sign