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@ravitejag-02nJVr • Mar 25, 2009
@pradeep-agrawal-rhdX5z • Mar 25, 2009
As you have declared the array of pointers in a class (i.e., using C++), so you can use new/delete operators for this. Consider that the array is array of integer pointers, so code will look like:yamrajbhallai declared a array of pointer *nm[10];
in class
and i need to input data in it and dynamically allocate memory for this and also i have to show the output
int *nm[10] = { 0 }; //Initializing array with all poiters set to NULL
int i = 0;
for(i = 0; i < 10; i++) {
nm[i] = new int; //Dynamic memory allocation
*(nm[i]) = <some value> //Assigning some data
}
for(i = 0; i < 10; i++) {
cout<<*(nm[i])<<endl; //Writing data to output stream
delete nm[i]; //Deleting allocated memory
}
-Pradeep
@ms-cs-Ab8svl • Mar 25, 2009
@yamrajbhalla-ZPvBoL • Mar 26, 2009
@yamrajbhalla-ZPvBoL • Mar 26, 2009
@pradeep-agrawal-rhdX5z • Mar 26, 2009
Could you please update which compiler you are using? Is there any error message displayed when the compiler is closed due to error? If yes, what the message?yamrajbhallait gives me right output bt after that c++ complier closes and a error occurs
@pradeep-agrawal-rhdX5z • Mar 27, 2009
~bill()
{delete item;}
};Above part of the code is creating problem.
~bill() {
for(int i = 0; i <= m; i++) {
delete item[j];
}
}Let us know if you face the issue after above changes.
@ravitejag-02nJVr • Mar 27, 2009
@just2rock-DkmPtO • Mar 27, 2009
can you pls be more specific about the actual code generating from this.pradeep_agrawal~bill() {delete item;} };Above part of the code is creating problem.
This is destructor of the class 'bill' and it is called when the object of this class is destroyed. In your case it will be called when the object 'obj' is destroyed. As the object 'obj' is statically declared in the main function of the class so it gets destroyed when the execution of the main function completes. That's why you are getting error at end of program execution. Now read below for the reason why this particular code segment is causing problem.
When the "delete item;" statement is executed, it tries to delete the memory statically allocated for the array and hence an exception. "delete" should be done for dynamically allocated memory. In your case, "delete" should be called for elements of array. So the destructor should look like
~bill() { for(int i = 0; i <= m; i++) { delete item[j]; } }Let us know if you face the issue after above changes.
-Pradeep
@pradeep-agrawal-rhdX5z • Mar 29, 2009
Yes, C++ have pointers too. And it provides better and more safe ways to handle memory allocations.Raviteja.gbut now i came to know that pointers are there in C++ too.
Am i right?
Is there anything specific in the description for which you need more details? I have already mentioned the code snippet of actual code that is causing problem and provided a sample code to fix that.just2rockcan you pls be more specific about the actual code generating from this.
@yamrajbhalla-ZPvBoL • Feb 4, 2023