为什么这个错误将由信号11终止 [英] Why this error is coming terminated by signal 11

问题描述

这里是代码

这是给出一些错误，请帮助



试图找到一个最大的非完美正方形< br $> b $ b

我的尝试：

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;
}

推荐答案

你甚至不需要一个阵列：

You don't even need an array for that:

#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;
}

这不会按原样编译。您需要先获取n然后根据它调整数组大小。这是分配整数数组的一种方法：

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 :

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

   // rest of code goes here

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

Quote：

为什么这个错误将被信号11终止

Why this error is coming terminated by signal 11

当你不明白为什么你的代码失败时，答案是调试器。



有一个工具可以让你看到你的代码正在做什么，它的name是调试器。它也是一个很好的学习工具，因为它向你展示了现实，你可以看到哪种期望与现实相符。

当你不明白你的代码在做什么或为什么它做它做的时候，答案就是答案是调试器。

使用调试器查看代码正在执行的操作。只需设置断点并查看代码执行情况，调试器允许您逐行执行第1行并在执行时检查变量。



调试器 - 维基百科，免费的百科全书 [ ^ ]



掌握Visual Studio 2010中的调试 - 初学者指南 [ ^ ]

使用Visual Studio 2010进行基本调试 - YouTube [ ^ ]

调试器在这里向您展示您的代码正在做什么，您的任务是与什么进行比较应该这样做。

调试器中没有魔法，它没有找到错误，它只是帮助你。当代码没有达到预期的效果时，你就会接近一个错误。

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.

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