My program is breaking before completing all execution

I am trying to find the Multiplication of Matrix with its transpose using Vectors. While Running program is not executing after printing my inputted matrix and breaking without doing any loops and athematic operations. Why does my program ended after 2nd for loop? Where I am wrong?

//  Multiplication of Matrix by its Transpose
#include<bits/stdc++.h>
using namespace std;
 
 int main()
 {
 int row,col;
 cout<<"ENTER ROWS:";
 cin>>row;
 cout<<"ENTER COLS:";
 cin>>col;

 vector<vector<int>> vec(row, vector<int> (row,col));
  vector<vector<int>>  tran(row, vector<int> (row,col));

 vector<vector<int>>  ans(row, vector<int> (row,col));

    for(int i=0;i<row;i++)
    {
     for(int j=0;j<col;j++)
     {
          int t;
       cin>>t;
         vec[i][j]=t;
     }
       
    } 
    cout<<"\n"<<"Orignal Matrix:"<<endl;
    for(int i=0;i<row;i++)
    {
       for(int j=0;j<col;j++)
       {
          cout<<vec[i][j]<<" ";
       }
       cout<<"\n";
    }

  for(int i=0;i<row;i++) // transpose
  {
      for(int j=0;j<col;j++)
      {
          tran[i][j]=vec[j][i];
      }
  }


  
cout<<"\n\nTranspose Matrix: \n\n";

  for(int i=0;i<col;i++)
  {
      for(int j=0;j<row;j++)
      {
        cout<<tran[i][j]<<" ";
      }
      cout<<endl;
     
  }

 for(int i=0;i<row;i++) // multiplication
 {
     for(int j=0;j<col;j++)
     {
         ans[i][0]=vec[i][0]*tran[0][j];
         ans[0][j]=vec[0][j]*tran[i][0];


     }
 }
 cout<<"\n\nMultiplied Matrix: \n\n";

  for(int i=0;i<row;i++)
 {
     for(int j=0;j<col;j++)
     {
         cout<<ans[i][j]<<" ";
     }
     cout<<endl;
 }



 } 

Output I am getting:

ENTER ROWS:3
ENTER COLS:5
2 4 5 5 6 
4 6 7 9 0
1 2 3 5 8

Orignal Matrix:
2 4 5 5 6
4 6 7 9 0
1 2 3 5 8 
 

Expected Output:

ENTER ROWS:3
ENTER COLS:5
2 4 5 5 6 
4 6 7 9 0
1 2 3 5 8

Orignal Matrix:
2 4 5 5 6
4 6 7 9 0
1 2 3 5 8 

Transpose Matrix:
2 4 1
4 6 2
5 7 3
6 9 5
6 0 8

Multiplied Matrix: 
106 112 98
112 182 82
98  82  103