Bar Chart printing program(By Arrays)

#include <iostream.h>
int main()
{
    const int arraysize=10;
    int a[arraysize]={0,0,0,0,0,1,2,4,2,1};
    for (int i=0;i<arraysize;i++)
    {
        if (i==0)
            cout <<" 0 - 9 : ";
        else if (i==100)
            cout <<"  100 : ";
        else
            cout <<i*10<<" - "<<(i*10)+9<<" : ";
        for (int stars=0;stars<a[i];stars++)
        cout <<"*";
        cout <<endl;
    }
    return 0;
}