write in c ++ programme. Write a program that determines the type of triangle for the given lengths of the sides:  the triangle does not exist,  an equilateral triangle,  an isosceles triangle,  A general triangle. 

Input: Three real numbers are the lengths of the sides of the triangle. Output: Depending on the type of triangle, output one of the following messages: The triangle does not exist. The triangle is equilateral. Triangle isosceles Triangle of general form.