It's console calculater. The basis is Interpreter pattern.
Functions:
add(arg1,arg2);
sub(arg1,arg2);
div(arg1,arg2);
mult(arg1,arg2);
let(var,value,expression);
Examples:
| Input | output |
|---|---|
| "add(5,7)" | 12 |
| "div(sub(add(-5,7),mult(3,-2)),2)" | 4 |
| "let(x,4.3,add(-4,x))" | 0.3 |
| "mult(let(y,sub(1,5),div(y,8)),5)" | -2.5 |
class Context store variables and its values.
class FuncExp2nd give analysise of string and calculate functions with two args.
class FuncExp3nd give analysise of string and calculate let function.