Simple Calculator

Given the numbers N1, N2 and an operation character C.

Write a simple calculator which performs the 4 basic mathematical operations (i.e. Addition, subtraction. Multiplication, and division) according to given character C.

Hint: Use type-casting

Input:

5

10

+

Where:

• First line of input represent number N1
• Second line of input represents number N2]
• Third line represents operation character C.

Output:

15.00

Note

• if C is not a valid operation then display -1.00
• If C is '/' (division) and N2 = 0 (zero) then display -2.00