Programming and Graphics

136 Introduction to C++ Programming and Graphics

cout << memad1 <<""<<memad2 << " "<< memad3 <<endl;

cout << *memad1 <<""<<*memad2 << " "<< *memad3 <<endl;

return 0;

}

The output of the code is:

0xbf9c6e48 0xbf9c6e50 0xbf9c6e58

1.1 1.2 1.3

Strings

Pointers of string variables behave in a similar fashion. Consider the
following code contained in the filepointerstring.cc:

#include <iostream>

using namespace std;

int main()

{

string onoma = "iakovos";

string * memad = &onoma;

cout << onoma << endl;

cout << memad << endl;

return 0;

}

Running the executable produces the output:

iakovos

0xbfa845f4

In this example, 0xbfa845f4 is the memory address of the first letter of the
stringiacovos.

String to character conversion

We can use pointers to convert a string variable to a character array.
First, we find the length of the string using thelengthfunction and introduce
an equal-sized character array. Second, we run through successive pointers of
the string characters while evaluating successive elements of the character array,
as illustrated in the following block:

string onoma= "arkouditsa";

int l = onoma.length();