Pattern 1

#include<iostream>
using namespace std;
int main()
{
int a=0;
for(int i=1;i<=16;i+=4)
{
cout<<endl;
for(int j=i;j<=i+a;j++)
cout<<" "<<char(j+64);
a++;
}
return 0;
}

By Ayush Gupta, Student