Half pyramid of alphabets in C++

 Half pyramid of alphabets in C++

#include<iostream>
using namespace std;
int main()
{
char input, alphabet='A';
cout<<"enter any uppercase alphabet";
cin>>input;
for(int i=1;i<=(input-'A'+1);++i)
{
for(int j=1;j<=i;++j)
{
cout<<alphabet<<" ";

}
alphabet++;
cout<<endl;
}
return 0;
}

output:

enter any uppercase alphabet : E

A

B B

C C C

D D D D

E E E E E