Program to make Histogram in C++

//Program to make Histogram in C++

#include <iostream.h>

void main()
{
int a[5] = {1,2,7,2,3};

for (int i = 1; i<5; i++)
{
cout << a[i] << "\t\t";
for (int k = 0; k<a[i]; k++)
cout << "*";

cout << endl;
}
}