Given a two-digit number n, print both the digits of the number.

Input Format: The first line indicating the number of test cases T.

Next T lines will each contain a single number ni.

Output Format: T lines each containing two digits of the number ni separated by space.

Constraints

1 <= T <= 100000 10 <= ni <= 99

Error: Runtime Error (SIGSEGV)

I'm not able to pinpoint, where the problem is in the code as it is working fine for a two numbers while it gives the runtime error for 4 or more numbers. Is there another way of doing this problem other than using for loop twice?

#include <bits/stdc  .h>
using namespace std;

int main()
{
    int t;
    int arr[t];
    cin>>t;
    for(int i=0;i<t;i  )
    {
        cin>>arr[i];
    }
    int c;
    int b;
    for(int i=0;i<t;i  )
    {
        c=(arr[i]/10);
        if(c!=0)
        {
            b=arr[i]%(c*10);
        }
        else 
        {
            b=arr[i];
        }
        cout<<c<<" "<<b<<endl;
    }
    
    
    return 0;
}

CodePudding user response：

Fist, you declare t, but do not initialize it, so it is uninitialized. Trying to use the value leads to undefined behavior.

Second, VLA is not valid C , see here. You have to use std::vector instead.

Third, you don't need to use an int.

So, you should do:

#include <iostream>
#include <vector>
#include <string>
int main()
{
    int t{};
    std::cin >> t;
    std::vector<std::string> arr(t);
    for(int i = 0; i < t; i  )
    {
        std::cin >> arr[i];
    }
    for(const auto &i : arr)
    {
        std::cout << i[0] << ' ' << i[1] << '\n';
    }

}