C# console application that evaluates a string expression consisting of non-negative integers and the + - / * operators only, taking into account the normal mathematical rules of operator precedence. Support for brackets is not implemented.
For example: an input string of "4+5*2" should output 14 an input string of "4+5/2" should output 6.5 an input string of "4+5/2-1" should output 5.5