c++ - Why do I get garbage value when output character array to console?

Question

I always get a garbage value like this 'íyyyy?????????t?t' at the end when i output my array. What am I doing wrong?

void func()
{
    const int size = 100;
    char * buffer = new char[size];
    for(int i=0; i<size; i++)
        buffer[i] = ' ';

    cout<<buffer;
}

However if I use a for loop to output the buffer, there is no garbage value.

Answer 1

Because you don't null terminate your buffer, std::cout.operator<<(char*) will try to find as its terminating character.

As pointed out in comments, feel free to append that to the end of your buffer :).