get two input at the same time and check for cin.fail()

[deathmoon]

is there any way to detect cin.fail for 2 inputs?

while(true)
        {
            cin >> row >> col;
            if (cin.fail()|| a[row][col]!='*')
            {
                cout << "bad input. Please reenter." << endl;
                cin.clear();
                cin.ignore(1000000,'\n');
            }
            else break;
        }

this doesn't work for it.. it only works for one input..

[hamsterman]

How does it not work?

[deathmoon]

keep looping "bad input" even though I enter a correct value..

[hamsterman]

Try this (exact same code that works for me. Maybe the '*' is your problem? )

#include <iostream>

int main(){
   int row, col;
   while(true)
   {
      std::cin >> row >> col;
      if (std::cin.fail())
      {
         std::cout << "bad input. Please reenter.\n";
         std::cin.clear();
         std::cin.ignore(1000000,'\n');
      }
      else break;
   }
}

[deathmoon]

then it keep buffering for my input..

buffer when I put only integers(let's say 2039), it buffers until I put F7(row should be a character,should be "A6","F10"), then after I enter a character and an integer )it displayed "bad input" again, if I only enter a character first it buffers until I input an int(let's say, I cin f, then it waits until I input 10), which is working...

[hamsterman]

Oh, row is a char and col is an int? Well, 2 in 2039 is a perfectly valid char. If you want it to fail, add an isalpha(row) condition. Though how do you expect a[row][col] to work then ?

[deathmoon]

So no any alternative way to solve it?

[Duthomhas]

There is nothing wrong with the code you pasted (syntactically). Are you sure that your array is initialized to '*'s?

Also, you should check the inputs for domain.

[deathmoon]

the '*' is the initialized value to the array, after inserting row and column the particular array will change to a 'X' or 'O'. I want to detect any faulty values inserted or inserting row and column which is already 'X' or 'O' which should not be changed anymore..

[Duthomhas]

At this point we need to see more code.

[deathmoon]

Problem solved by using my own method. Thanks for the replies.