Hello, I am runing this program this works if I dont delete anything in destructor. If I use delete variable name in destructor then it creates problem. It creates problem when destrctor get called while operator ovrerloading. I think It is trying to delete the memory that has already been deleted.
COuld any one help me in solving tis issue?
#include
<iostream>
using
namespace std;
class
matrix
{
int **ptr,row,col;
public
:
matrix()
{
row = 2;
col = 2;
ptr =
new int *[row];
for(int i=0;i<row;i++)
{
ptr[i] =
new int[col];
for(int j=0;j<col;j++)
ptr[i][j] = 0 ;
}
cout <<
"Non parametrized constructor invoked" << endl;
}
matrix(
int m, int n)
{
row = m ;
col = n;
ptr =
new int *[row];
for(int i=0;i<row;i++)
{
ptr[i] =
new int[col];
for(int j=0;j<col;j++){
ptr[i][j] = 0 ;
}
}
cout <<
"Parametrized constructor invoked" << endl;
}
~matrix()
{
for (int i=0;i<row ; i++)
{
delete ptr[i];
}
delete ptr;
cout <<
"Destructor invoked" << endl;
}
void getdata()
{
cout <<
"This matrix has " << row << "rows and" << col << "colums" << endl;
cout <<
"Enter the array elements: " << endl;
ptr =
new int*[row];
for(int i=0;i<row;i++)
{
ptr[i] =
new int[col];
for(int j=0;j<col;j++)
cin >> ptr[i][j] ;
}
}
void output()
{
cout <<
"Matrix is: " << endl;
for(int i=0;i<row;i++)
{
for(int j=0;j<col;j++)
{
cout << ptr[i][j] <<
"\t";
}
cout << endl;
}
}
// + operator overloading
matrix
operator + ( matrix obj)
{
matrix obj1;
for (int i=0;i<row;i++)
{
for (int j=0;j<col;j++)
{
obj1.ptr[i][j] = ptr[i][j] + obj.ptr[i][j];
}
}
return obj1;
}
void mem()
{
cout <<
"Memory layout is: " << endl;
for(int i=0;i<row;i++)
{
for(int j=0;j<col;j++)
{
cout << ptr[i] <<
"\t";
}
cout << ptr <<
"\t";
cout << endl;
}
}
};
void main()
{
matrix mat, mat1(2,2),mat2(2,2) ;
mat1.getdata();
mat2.getdata();
mat = mat1 + mat2;
cout <<
"Bye" << endl;
}Param