Why wont my code output even if i put Console.ReadLine()-CodePudding

I tried using different compilers even internet sites for c# but nothing will output I don't know why. This is just practise for a test in school, the idea is to use the "netherland flag" algorithm or the tricolored flag algorithm.

        static void Main(string[] args)
        {
            int[] a = { 14, 18, 6, 4, 7, 12, 3, 9, 11 };
            int t = 0;
            int o = a.Length;
            int i = 0;
            int privremeno = 0;
            while (i<9)
            {
                if (a[i]%3==0)
                {
                    privremeno = a[i];
                    a[t] = a[i];
                    a[i] = privremeno;
                    t  ;
                }
                else if (a[i]%3!=0 && a[i]%7!=0)
                {
                    privremeno = a[i];
                    a[o] = a[i];
                    a[i] = privremeno;
                    o--;
                    
                }
                if (o==i)
                {
                    break;
                }
            }
            for (int j = 0; j < 9; j  )
            {
                Console.WriteLine(a[j]);
            }
        }```

CodePudding user response：

nothing will output I don't know why.

You wrote while(i<9) but you don't appear to ever increment i so your loop runs forever .. the code never reaches a point where anything is output

CodePudding user response：

You forgot to increment your i loop variable so its value is always 0. Instead, why not use a for loop or a foreach loop since you don't really need to know what loop iteration you're on.

for ( int i = 0; i < 9; i   )

Or use:

foreach ( var num in a )

Also, you need to change this:

int o = a.Length;

To this:

int o = a.Length - 1;

If you don't you will get an IndexOutOfRangeException the first time the application enters the else if (a[i]%3!=0 && a[i]%7!=0) branch.