Write a program that read an alphabetic character and print the triangle.
The program should contain 1 file: Triangle.cpp: contain nested loops
Example of the result:
Enter an alphabetic: r
r
rs
rst
rstu
rstuv
rstuvw
rstuvwx
rstuvwxy
rstuvwxyz
rstuvwxy
rstuvwx
rstuvw
rstuv
rstu
rst
rs
r
