Thread: Help with flawed algorithm?

Originally Posted by qny

If the user types "<SPACE> <4> <2> <SPACE> <ENTER>" this will not consume the <ENTER>.

It presumes the user is not a drunken sod, at that time - true.

Lol actually, Adak, it worked! I Had to tweak it a bit. But now I found another bug, prolly the last one! The code below is the mathematical algorithm the matrix does... The only problem is with division - if I enter numbers to divide - any numbers - it will tell me it failed (failed = the sum is NOT an integer!)

Code:

 switch (matrix[i][j])
         {
            case '+': matrix[i+1][j] = (matrix[i-1][j]) + (matrix[i+1][j]);
                      break;
            case '-': matrix[i+1][j] = (matrix[i-1][j]) - (matrix[i+1][j]);
                      break;
            case '*': matrix[i+1][j] = (matrix[i-1][j]) * (matrix[i+1][j]);
                      break;
            case '/':  if ((matrix[i+1][j]) ==0 )
                      {
                          printf("There is a division by zero");
                          return 1;
                      }
                      if (((matrix[i-1][j] / matrix[i+1][j])%2)  != 0)
                      {
                          left=1;
                      }


                      if (left == 1 )
                      {
                          printf("There is a non-integer division");
                          return 1;
                      }


                      matrix[i+1][j] = (matrix[i-1][j]) / (matrix[i+1][j]);
                      break;
         }

I tried a few variations but none worked...

The %2 thingy doesn't work for some reason.... and it enters the "Non Integer division" all the time! Even if : 1/1-1

Suggestions?

Probably because both matrix[i-1][j] and matrix[i+1][j] are Integers. Any way around that, tho? To save only the division's output? I tried putting it into float but it won't work...