Why this error is coming terminated by signal 11

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here is the code
this is giving some error, plz help

tried to find max non perfect square in an arary

What I have tried:

#include<iostream>
#include<math.h>

int main()
{
    int mp=-1;
    int n;
    int A[n];
    std::cin>>n;
    int i;
    for(i=0;i<n;i++)
    {
        std::cin>>A[i];
    }
    for(i=0;i<n;i++)
    {
        int d=sqrt(A[i]);
        if(d*d!=A[i])
        {
            if(A[i]>mp)
            {
                mp=A[i];
            }
        }
    }
    std::cout<<mp;
    return 0;
}

Posted 23-Jan-18 8:57am

Member 13639632

Updated 23-Jan-18 12:16pm

Rick York

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ZurdoDev 23-Jan-18 15:00pm

And what is the error?

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CPallini · Answer 1 · 2018-01-23T11:05:00

You don't even need an array for that:

C++

#include <iostream>
#include <cmath>

int main()
{
  int mp=-1;

  int N;

  std::cin >> N;

  for(int n =0; n < N; n++)
  {
    int x;
    std::cin >> x;
    if ( x > mp)
    {
      int d = static_cast<int>(sqrt(x));
      if ( d*d != x )
        mp = x;
    }
  }
  std::cout << "the maximum non-perfect-square number is " << mp << std::endl;
}

Rick York · Answer 2 · 2018-01-23T09:27:00

This will not compile as it is. You need to obtain n first and then size the array according to it. Here is one way to allocate an integer array :

C++

...
   int n;
   std::cin >> n;
   int * intArray = new int[n];

   // rest of code goes here

   delete [] intArray;  // memory must be freed after use
}

Patrice T · Answer 3 · 2018-01-23T11:18:00

Quote:
Why this error is coming terminated by signal 11

When you don't understand why you code fail, the answer is debugger.

There is a tool that allow you to see what your code is doing, its name is debugger. It is also a great learning tool because it show you reality and you can see which expectation match reality.
When you don't understand what your code is doing or why it does what it does, the answer is debugger.
Use the debugger to see what your code is doing. Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.

Debugger - Wikipedia, the free encyclopedia[^]

Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't find bugs, it just help you to. When the code don't do what is expected, you are close to a bug.

Why this error is coming terminated by signal 11

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