Char array wierd characters

[Retrokin]

CODE:

#include <iostream>

using namespace std;

void testfunc(char* outStr)
{
  //char str[10];
  for(int i=0; i < 4; i++)
  {
    outStr[i] = 'O';
  }
}

int main()
{
    char test[4];
    testfunc(test);
    cout << test;
    int iInt=3;
    test[iInt] = 'P';
    cout << " " << test;
    return 0;
}

Whenever I run this program I get:OOOO OOOP❤
Why do I get the heart? Thx in advance.

[MiiNiPaa]

Because last symbol in char array always should be \0.
http://en.wikipedia.org/wiki/Null-terminated_string

[Retrokin]

So I tryed editing like this:

void testfunc(char* outStr)
{
  //char str[10];
  for(int i=0; i < 4; i++)
  {
    outStr[i] = 'O';
  }
  outStr[4]='\0';
}

And I still get the heart, but when I do this:

int main()
{
    char test[4];
    testfunc(test);
    cout << test;
    int iInt=3;
    test[iInt] = 'P';
    cout << "          " << test;
    return 0;
}

It's fine.

Please someone tell me, what am I doing wrong?

[Chervil]

    char test[5];    // allow one extra character for the null terminator
    test[4] = '\0';  // and make sure it is set to null. 

[Retrokin]

thx got it working, btw sorry I took so long to reply