Thread: Help please!

How do i pass array to int main?


cheers.

Code:

char openR(){
                       
                       
                       ifstream filein;
                       filein.open("stores.ddf");
                       
                       if (!filein) {
                                    
                                    cout<<"\file did not open";
                                    return 0;
                                    
                                    }
                       
                       filein.seekg(0,ios::end);
                       len=filein.tellg();
                       filein.seekg(0,ios::beg);
                       
                       filein.read(array,len);
                       
                       filein.close();
                       
                       return (array[256]);
                       
                       
                      };

it compiles fine but i just can't see the content of array in int main.

create array (or vector) in main
and pass it by ref into openR

Originally Posted by vart

create array (or vector) in main
and pass it by ref into openR

yes ofcourse thankyou.

You seem to be passing a char of some kind. You need a container.
Perhaps you want the array to be accessible in main()?

Code:

container_type & openR();
//return reference to your array

int main()
{
  container_type my_array(openR());
  //use my_array
}

so now...

Code:

        
container_type & openR() {
                       
                       container_type ret_val;
                       ifstream filein;
                       filein.open("stores.ddf");
                       
                       if (!filein) {
                                    
                                    cout<<"\file did not open";
                                    //return 0;
                                        //can't return 0 anymore.
                                        //either return a blank array and check for it in main
                                        //or throw an exception
                                    }
                       
                  //...................
                       
                       return ret_val;
                       
                       
                      };

Personally, I'd use std::string. So you could do your reading operations on

Code:

char* array = new char[len];

and then have

Code:

std::string ret_val(array);

And right before you

Code:

 return ret_val;

DON'T FORGET to

Code:

delete [] array;

Hope that helps.