c++ - 数组的行操作

Question

我必须做这个练习:

Write a C + + function that, given an array with two NxN size of integers, returns true if the rows to have all the same elements (even in different locations), and false otherwise.

这是我的代码:

#include <iostream>

using namespace std;

const int N = 5;


bool fool ( const int a [N][N])
{
    int x,y = 0;
    int j=0;
    int i=0;

    bool check[N] = {false};
    bool verify = false;

    for (i=0; i<N; i++)
    {

       check[i] = false;

    }

       while(j<N && !verify )
       {

         if(a[x][i]==a[y][j] && !check[j] )
         {

            check[j]=true;
            verify=true;
         }

         j++;

       }

       return verify;

}


int main ()
{


    const int a[N][N] = {{1,3,5,6,7},
                         {5,6,7,1,3},
                         {1,6,5,3,7},
                         {6,1,3,5,7},
                         {6,5,1,7,3}};




    if ( fool(a))
    {

           cout << " in all rows there are the same elements";

    }


    else
    {

           cout << " wrong, . ";

    }

    return 0;


}

但是程序崩溃了。我该如何解决？

Answer 1

while( int j<N && !verify )

不要在循环内部声明j，它应该在外部声明。我很惊讶这甚至可以编译(它不能在 Visual Studio C++ 中编译)。