How to input either an integer or a character in a 2d array

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So i have this 2D array that can receive input from the user, as of now getting integer works perfectly fine , but i need it to be able to receive characters as well

std::cout << "Enter the values : " << endl;
                int value = 0;
				cin >> value;
				
				if (std::isdigit(value)) 
				{
					matrix[x][y] = value;
				}
				else 
				{
					matrix[x][y] = 0;
				}

What I have tried:

i tried using the simple isDigit function but when i enter anything else than an integer it terminates the whole program and yes the objective is to equal value to = 0, might be basic but im new to c++

Posted 7-Oct-22 6:01am

Sohkar A Lensky

Updated 7-Oct-22 6:17am

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jeron1 7-Oct-22 12:17pm

isdigit() is looking for a character type, try changing 'value' and 'matrix' (I am guessing matrix type is int) to be type char, and see what happens.

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OriginalGriff · Answer 1 · 2022-10-07T06:17:00

Solution 2

To do that, you need to change it round: read a string value, and see if you can convert it to an integer. If you can, use the number. If it isn't - its character based. Use stoi[^] in a try ... catch block.

Posted 7-Oct-22 6:17am

OriginalGriff

Richard MacCutchan · Answer 2 · 2022-10-07T06:14:00

You need to change the declaration of value to char. That way you can accept either type. Note that your code above will never work since std::isdigit tests characters, not integer values. So you need something like:

C++

std::cout << "Enter the values : " << endl;
char value;
cin >> value;

if (std::isdigit(value)) 
{
	matrix[x][y] = value - '0'; // convert character to integer
}
else 
{
	matrix[x][y] = 0;
}