Question

I have a question. Is it possible to create multiple objects during run time for classes or structures?

#include<iostream>
#include<conio.h>
using namespace std;
struct node
{
       int no;
};

int main()
{
   int i;
   for(i=0;i<4;i++)
   {
                   struct node s[i];
   }
   cout<<"Enter the values";
   for(i=0;i<4;i++)
   {
                   cin>>s[i].no;
   }
   cout<<"The values are:";
   for(i=0;i<4;i++)
   {
                   cout<<s[i].no<<endl;
   }
   getch();
   return 0;
}

I tried the method above , but didn’t succeed . Any help would be appreciated

Answer 1

replace

for(i=0;i<4;i++)
{
       struct node s[i];
}

with

 struct node s[4];

the way you wrote your program will not work. You defined the node array s inside a block so it will not be visible outside of that block.

If you want to dynamically allocate the memory you have to do something like:

 struct node *s = new node[YourDesiredSize];

or if you like the c style (not recommended):

 struct node *s;
 s = (node*)malloc(YourDesiredSize * sizeof (node));

and don’t forget to free the memory.