totse.com | A C++ question

KING G · #1 2007-04-17, 07:12

when you are trying to pass a variable as an argument to a function, you use this code:

Code:

PutItHere = Function(NameOfArgument);

now what would you need to transfer arrays through functions?

ArgonPlasma2000 · #2 2007-04-17, 07:30

A pointer.

Code:

void sortThisArray(int*);



int main(){

   int someArray[5];

    sortThisArray(someArray);

    return 0;

}

Axiom · #3 2007-04-17, 07:46

You have a couple options.

If you're wanting to return a value you can create a struct object and pass that to the function...

Code:

#include <cstdlib>
#include <iostream>

using namespace std;

struct mystruct {
    int array_name[5];
};

mystruct Function(mystruct var1);

int main(int argc, char *argv[])
{
    //Create the struct to house the array
    mystruct varable1;
    //Print out array
    cout << "Array Before Passing To Function" << endl;
    cout << varable1.array_name[0] << endl;
    cout << varable1.array_name[1] << endl;
    cout << varable1.array_name[2] << endl;
    cout << varable1.array_name[3] << endl;
    cout << varable1.array_name[4] << endl;
    //Pass struct to function
    varable1 = Function(varable1);
    //Print array again
    cout << "Array After Passing To Function" << endl;
    cout << varable1.array_name[0] << endl;
    cout << varable1.array_name[1] << endl;
    cout << varable1.array_name[2] << endl;
    cout << varable1.array_name[3] << endl;
    cout << varable1.array_name[4] << endl;
    //wxDevcpp Code
    system("PAUSE");
    return EXIT_SUCCESS;
}

mystruct Function(mystruct var1){
   //Fill array with 1-5
   var1.array_name[0] = 1;
   var1.array_name[1] = 2;
   var1.array_name[2] = 3;
   var1.array_name[3] = 4;
   var1.array_name[4] = 5;
   return var1;
}

Note: I can't spell variable

KING G · #4 2007-04-17, 07:48

ummm, I'm gonna go with teh pointer

Axiom · #5 2007-04-17, 07:58

lol, np... This is it in theory

Code:

struct mystruct {
    int array_name[5];
};

mystruct Function(mystruct var1);

int main()
{
    mystruct varable1;
    variable1 = Function(variable1);
    return 0;
}

ArgonPlasma2000 · #6 2007-04-17, 08:01

Lemme guess, they skipped over for loops, Axiom?

Axiom · #7 2007-04-17, 08:10

Loops?... They have loops now?...

lifejunkie · #8 2007-04-17, 14:45

Quote:

Originally Posted by Axiom View Post

lol, np... This is it in theory

Code:

struct mystruct {
    int array_name[5];
};

mystruct Function(mystruct var1);

int main()
{
    mystruct varable1;
    varable1 = Function(varable1);
    return 0;
}

Why would you do that?

Code:

/* Create the dataset */
void makedata(int *data, int size)
{
  for (int i = 0; i < size; i++)
    data[i] = i * 2 + 1;
}

/* Display the dataset */
void showdata(int *data, int size)
{
  for (int i = 0; i < size; i++)
    printf("%d\n", data[i]);
}

/* Driver */
int main( void )
{
  const int data_size = 5;

  int data[data_size];

  makedata(data, data_size);
  showdata(data, data_size);

  return(0);
}

Axiom · #9 2007-04-17, 15:15

Quote:

Originally Posted by lifejunkie View Post

Why would you do that?

Good question...

I felt the syntax used by the OP disqualified void functions...

KING G · #10 2007-04-17, 23:12

I'm gonna try all these methods out.

I belive there is a way to do this using loops? I mean, to send an entire word or so to a function using one varible that (for) loop.

I'm not into solving the problem now, I want to learn more.

does anyone think that I should start learning a library, if so, which one?

thanks alot guys, you've been a great help.