printing error of array

[Srija]

hi...........

i have the following code written in MSVisual Studio C++ 2008 express edition. As the code says to print 20 but it is printing 27 why???

#include <iostream>

using namespace std;

int main()
{
	int s[20];
	int count = 0,i=0;
	do	
	{
		i++;
		count++;
		
	}
	while(s[i]!= '\0');
	cout<<count<<endl;
	return 0;
}

I used most of the control statements but it is giving the same value............
thanq if anybody helps me...............

[vlad from moscow]

Your local array s[20] is not initialized. So its elements can contain any values that were in memory before the array was allocated.
Also you are trying to compare integer value with a charavcter literal '\0'. It is not an error, but this construction usually is used with character arrays which have terminated zero.

[Moschops]

As the code says to print 20

As Vlad has implied, the code says no such thing.

[vlad from moscow]

I will show you a more interesting program that does the same. Your compiler shall support C++ 2011

#include <iostream>
#include <iterator>
#include <numeric>
#include <algorithm>

using namespace std;

int main()
{
   const int N = 20;
   int a[N];

   iota( begin( a ), end( a ), 0 );
   random_shuffle( begin( a ), end( a ) );

   for ( const auto &i : a ) cout << i << ' ';
   cout << endl;

   int count = 0;

   for ( const auto &i : a )
   {
      if ( i == 0 ) break;
      ++count;
   }

   cout << "count = " << count << endl;

   return ( 0 );
}