String Evaluate

Use C++ to evaluate a string. Support complex numbers, function names and variables.

Call the evaluation function

string msg;
// eval with variables 'x' and 'y'
cout << eval("log(-2) * i + 2 $x ^ ($y - 1)", { "x", "y"} , { Comp(1, 2), Comp(3, 4) }, &msg) << endl;
cout << eval("-arcsin(2-i)") << endl;
cout << eval("abs(3 + 4i)") << endl;

• Variable Names are started with the symbol $.
• +, -, *, /, ^ and normal maths function names are supported.
• Imaginary unit can be i, I, j or J.
• Brackets can be (), [] or {}.