error in pointers[solved]

[omar shaaban]

when i excute this program it responds because of this line:

Code: Select all

sold->number=223;

here is the code :

Code: Select all

#include <iostream>
using namespace std;
 typedef struct df {
    int number;
    void talk()
    {
        std::cout<<number<< "\n";
        }
    };
int main()
{
    df gh;
    gh.number=1;
      df * sold ;
      sold->number=223;
      sold->talk();
    gh.talk();
    return 0;
}

thanks for reading

[B@z]

i dont know what do u want to achive but you cant just use a pointer without initializing it.

if you want the sold point to gh, then you have to do
df *sold = &gh;

then play with it. if you want sold points a different variable, then you have to create it BEFORE u use xD

[Acki]

right, if you want to use a pointer you'll have to create the object...
like this:

Code: Select all

df* sold = new df; 

and don't forget to delete the object when it's not needed anymore !!!

Code: Select all

delete sold;