C++ Programming Exercise: Implement a function bool** aListToMatrix(vector<int>

Question

C++ Programming Exercise:

Implement a function

bool** aListToMatrix(vector<int> aLists[], int size);

that returns an adjacent matrix equivalent to aLists(adjacent lists)

Here is my solution:

#include<iostream>
#include<vector>
using namespace std;

bool **aListToMatrix(vector<int> aList[], int size)
{
   bool** matrix = new bool*[size];
  
   for(int i = 0; i < size; i++)
   {
   matrix[i] = new bool[size];
   }

   for(int i = 0; i < size; i++)
   {
       for(int j = 0; k < (aList+j)->size(); j++)
       {
   for(int k = 0; k < size; k++)
           {
   if((aList+i)->at(j) == k)
               {
                   *(*(arr+k)+i) = true;
               }
   else
               {
*(*(arr+k)+i) = false;
               }
   }
   }
   }
   return matrix;
}

int main()
{
   int i, j;
   bool **matrix;  
   vector<int> aList(5);

   for(i = 1; i <= 5; i++)
   {
       aList.push_back(i);
   }
   matrix = aListToMatrix(&aList,5);
   for(i = 0; i < 5; i++)
   {
       for(j = 0; j < 5; j++)
       {
           cout << " " << matrix[i][j];
       }
   }
   return 0;
}

The code is not working because the line "if((aList+i)->at(j) == k)" is causing a runtime error. Can someone fix this line?

Explanation / Answer

Inside the function in the for loop of statement:

Incorrect statement: for(int j = 0; k < (aList+j)->size(); j++)

Correct statement: for(int j = 0; k < (aList+j)->size; j++)

Now run and you will get the desired output

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