Miscellaneous end-user functions defined with DefineFunction()
ID: 10
See: DefineFunction
using uCalcSoftware;
var uc = new uCalc();
Console.WriteLine("---- Simple function def ----");
uc.DefineFunction("f(x) = x ^ 2 + 5");
Console.WriteLine(uc.Eval("f(10)"));
Console.WriteLine("---- Function overloading ----");
// Overloading based on parameter type or number of parameters
uc.DefineFunction("MyOverload(x As Double) = x + x");
uc.DefineFunction("MyOverload(x As String) As String = x + x");
uc.DefineFunction("MyOverload(x As String, y As String) As String = x + y");
uc.DefineFunction("MyOverload(x, y) = x + y");
Console.WriteLine(uc.EvalStr("MyOverload(5)"));
Console.WriteLine(uc.EvalStr("MyOverload('Ha')"));
Console.WriteLine(uc.EvalStr("MyOverload('Hello ', 'world!')"));
Console.WriteLine(uc.EvalStr("MyOverload(5, 10)"));
Console.WriteLine("---- Definition hiding/un-hiding ----");
// Shadowing (hiding) definitions
uc.DefineFunction("h(x) = x * 10");
Console.WriteLine(uc.Eval("h(3)"));
var hFunc = uc.DefineFunction("h(x) = x * 100"); // hides previous def
Console.WriteLine(uc.Eval("h(3)"));
hFunc.Release(); // Releasing this restores previous def
Console.WriteLine(uc.Eval("h(3)"));
Console.WriteLine("---- Optional parameters ----");
uc.DefineFunction("Opt(x, y = 5, z As String = 'Hello') = x + y + Length(z)");
Console.WriteLine(uc.Eval("Opt(10)"));
Console.WriteLine(uc.Eval("Opt(10, 20)"));
Console.WriteLine(uc.Eval("Opt(10, 20, 'Just a test 123')"));
Console.WriteLine("---- Recursion ----");
uc.DefineFunction("Factorial(x) = iif(x > 1, x * Factorial(x - 1), 1)");
uc.DefineFunction("Fib(n) = IIf(n < 2, n, Fib(n - 1) + Fib(n - 2))");
Console.WriteLine(uc.Eval("Factorial(5)"));
Console.WriteLine(uc.Eval("Fib(10)"));
// Bootstrap - builds new def on top of existing one
Console.WriteLine("------ Bootstrapping -------");
Console.WriteLine(uc.EvalStr("Hex(123)")); // uses "built-in" version of Hex()
var MyHex = uc.DefineFunction("Hex(number As Int) As String = '0x' + UCase(Hex(number))", bootstrap: true);
Console.WriteLine(uc.EvalStr("Hex(123)"));
MyHex.Release();
Console.WriteLine(uc.EvalStr("Hex(123)"));
// Overwrite - useful for spreadsheet-like functionality
Console.WriteLine("------ Overwrite -------");
uc.DefineFunction("SpreadsheetCell_A1() = 5", overwrite: true);
uc.DefineFunction("SpreadsheetCell_B2() = SpreadsheetCell_A1() * 10", overwrite: true);
uc.DefineFunction("SpreadsheetCell_C3() = SpreadsheetCell_A1() + SpreadsheetCell_B2()", overwrite: true);
Console.WriteLine(uc.Eval("SpreadsheetCell_A1()"));
Console.WriteLine(uc.Eval("SpreadsheetCell_B2()"));
Console.WriteLine(uc.Eval("SpreadsheetCell_C3()"));
// SpreadsheetCell_C3() will be affected by the definition changes of SpreadsheetCell_A1() and SpreadsheetCell_B3()
uc.DefineFunction("SpreadsheetCell_B2() = SpreadsheetCell_A1() * 100", overwrite: true);
uc.DefineFunction("SpreadsheetCell_A1() = 25", overwrite: true);
Console.WriteLine("-------");
// Note: Empty parenthesis are optional for functions with no parameters
Console.WriteLine(uc.Eval("SpreadsheetCell_A1"));
Console.WriteLine(uc.Eval("SpreadsheetCell_B2"));
Console.WriteLine(uc.Eval("SpreadsheetCell_C3"));
// See Define() topic for more
---- Simple function def ----
105
---- Function overloading ----
10
HaHa
Hello world!
15
---- Definition hiding/un-hiding ----
30
300
30
---- Optional parameters ----
20
35
45
---- Recursion ----
120
55
------ Bootstrapping -------
7b
0x7B
7b
------ Overwrite -------
5
50
55
-------
25
2500
2525
#include <iostream>
#include "uCalc.h"
using namespace std;
using namespace uCalcSoftware;
int main() {
uCalc uc;
cout << "---- Simple function def ----" << endl;
uc.DefineFunction("f(x) = x ^ 2 + 5");
cout << uc.Eval("f(10)") << endl;
cout << "---- Function overloading ----" << endl;
// Overloading based on parameter type or number of parameters
uc.DefineFunction("MyOverload(x As Double) = x + x");
uc.DefineFunction("MyOverload(x As String) As String = x + x");
uc.DefineFunction("MyOverload(x As String, y As String) As String = x + y");
uc.DefineFunction("MyOverload(x, y) = x + y");
cout << uc.EvalStr("MyOverload(5)") << endl;
cout << uc.EvalStr("MyOverload('Ha')") << endl;
cout << uc.EvalStr("MyOverload('Hello ', 'world!')") << endl;
cout << uc.EvalStr("MyOverload(5, 10)") << endl;
cout << "---- Definition hiding/un-hiding ----" << endl;
// Shadowing (hiding) definitions
uc.DefineFunction("h(x) = x * 10");
cout << uc.Eval("h(3)") << endl;
auto hFunc = uc.DefineFunction("h(x) = x * 100"); // hides previous def
cout << uc.Eval("h(3)") << endl;
hFunc.Release(); // Releasing this restores previous def
cout << uc.Eval("h(3)") << endl;
cout << "---- Optional parameters ----" << endl;
uc.DefineFunction("Opt(x, y = 5, z As String = 'Hello') = x + y + Length(z)");
cout << uc.Eval("Opt(10)") << endl;
cout << uc.Eval("Opt(10, 20)") << endl;
cout << uc.Eval("Opt(10, 20, 'Just a test 123')") << endl;
cout << "---- Recursion ----" << endl;
uc.DefineFunction("Factorial(x) = iif(x > 1, x * Factorial(x - 1), 1)");
uc.DefineFunction("Fib(n) = IIf(n < 2, n, Fib(n - 1) + Fib(n - 2))");
cout << uc.Eval("Factorial(5)") << endl;
cout << uc.Eval("Fib(10)") << endl;
// Bootstrap - builds new def on top of existing one
cout << "------ Bootstrapping -------" << endl;
cout << uc.EvalStr("Hex(123)") << endl; // uses "built-in" version of Hex()
auto MyHex = uc.DefineFunction("Hex(number As Int) As String = '0x' + UCase(Hex(number))", 0, uCalc::DataType::Empty, true);
cout << uc.EvalStr("Hex(123)") << endl;
MyHex.Release();
cout << uc.EvalStr("Hex(123)") << endl;
// Overwrite - useful for spreadsheet-like functionality
cout << "------ Overwrite -------" << endl;
uc.DefineFunction("SpreadsheetCell_A1() = 5", 0, uCalc::DataType::Empty, false, true);
uc.DefineFunction("SpreadsheetCell_B2() = SpreadsheetCell_A1() * 10", 0, uCalc::DataType::Empty, false, true);
uc.DefineFunction("SpreadsheetCell_C3() = SpreadsheetCell_A1() + SpreadsheetCell_B2()", 0, uCalc::DataType::Empty, false, true);
cout << uc.Eval("SpreadsheetCell_A1()") << endl;
cout << uc.Eval("SpreadsheetCell_B2()") << endl;
cout << uc.Eval("SpreadsheetCell_C3()") << endl;
// SpreadsheetCell_C3() will be affected by the definition changes of SpreadsheetCell_A1() and SpreadsheetCell_B3()
uc.DefineFunction("SpreadsheetCell_B2() = SpreadsheetCell_A1() * 100", 0, uCalc::DataType::Empty, false, true);
uc.DefineFunction("SpreadsheetCell_A1() = 25", 0, uCalc::DataType::Empty, false, true);
cout << "-------" << endl;
// Note: Empty parenthesis are optional for functions with no parameters
cout << uc.Eval("SpreadsheetCell_A1") << endl;
cout << uc.Eval("SpreadsheetCell_B2") << endl;
cout << uc.Eval("SpreadsheetCell_C3") << endl;
// See Define() topic for more
}
---- Simple function def ----
105
---- Function overloading ----
10
HaHa
Hello world!
15
---- Definition hiding/un-hiding ----
30
300
30
---- Optional parameters ----
20
35
45
---- Recursion ----
120
55
------ Bootstrapping -------
7b
0x7B
7b
------ Overwrite -------
5
50
55
-------
25
2500
2525
Imports System
Imports uCalcSoftware
Public Module Program
Public Sub Main()
Dim uc As New uCalc()
Console.WriteLine("---- Simple function def ----")
uc.DefineFunction("f(x) = x ^ 2 + 5")
Console.WriteLine(uc.Eval("f(10)"))
Console.WriteLine("---- Function overloading ----")
'// Overloading based on parameter type or number of parameters
uc.DefineFunction("MyOverload(x As Double) = x + x")
uc.DefineFunction("MyOverload(x As String) As String = x + x")
uc.DefineFunction("MyOverload(x As String, y As String) As String = x + y")
uc.DefineFunction("MyOverload(x, y) = x + y")
Console.WriteLine(uc.EvalStr("MyOverload(5)"))
Console.WriteLine(uc.EvalStr("MyOverload('Ha')"))
Console.WriteLine(uc.EvalStr("MyOverload('Hello ', 'world!')"))
Console.WriteLine(uc.EvalStr("MyOverload(5, 10)"))
Console.WriteLine("---- Definition hiding/un-hiding ----")
'// Shadowing (hiding) definitions
uc.DefineFunction("h(x) = x * 10")
Console.WriteLine(uc.Eval("h(3)"))
Dim hFunc = uc.DefineFunction("h(x) = x * 100") '// hides previous def
Console.WriteLine(uc.Eval("h(3)"))
hFunc.Release() '// Releasing this restores previous def
Console.WriteLine(uc.Eval("h(3)"))
Console.WriteLine("---- Optional parameters ----")
uc.DefineFunction("Opt(x, y = 5, z As String = 'Hello') = x + y + Length(z)")
Console.WriteLine(uc.Eval("Opt(10)"))
Console.WriteLine(uc.Eval("Opt(10, 20)"))
Console.WriteLine(uc.Eval("Opt(10, 20, 'Just a test 123')"))
Console.WriteLine("---- Recursion ----")
uc.DefineFunction("Factorial(x) = iif(x > 1, x * Factorial(x - 1), 1)")
uc.DefineFunction("Fib(n) = IIf(n < 2, n, Fib(n - 1) + Fib(n - 2))")
Console.WriteLine(uc.Eval("Factorial(5)"))
Console.WriteLine(uc.Eval("Fib(10)"))
'// Bootstrap - builds new def on top of existing one
Console.WriteLine("------ Bootstrapping -------")
Console.WriteLine(uc.EvalStr("Hex(123)")) '// uses "built-in" version of Hex()
Dim MyHex = uc.DefineFunction("Hex(number As Int) As String = '0x' + UCase(Hex(number))", bootstrap:=True)
Console.WriteLine(uc.EvalStr("Hex(123)"))
MyHex.Release()
Console.WriteLine(uc.EvalStr("Hex(123)"))
'// Overwrite - useful for spreadsheet-like functionality
Console.WriteLine("------ Overwrite -------")
uc.DefineFunction("SpreadsheetCell_A1() = 5", overwrite:=true)
uc.DefineFunction("SpreadsheetCell_B2() = SpreadsheetCell_A1() * 10", Overwrite:=true)
uc.DefineFunction("SpreadsheetCell_C3() = SpreadsheetCell_A1() + SpreadsheetCell_B2()", overwrite:=true)
Console.WriteLine(uc.Eval("SpreadsheetCell_A1()"))
Console.WriteLine(uc.Eval("SpreadsheetCell_B2()"))
Console.WriteLine(uc.Eval("SpreadsheetCell_C3()"))
'// SpreadsheetCell_C3() will be affected by the definition changes of SpreadsheetCell_A1() and SpreadsheetCell_B3()
uc.DefineFunction("SpreadsheetCell_B2() = SpreadsheetCell_A1() * 100", overwrite:=true)
uc.DefineFunction("SpreadsheetCell_A1() = 25", overwrite:=true)
Console.WriteLine("-------")
'// Note: Empty parenthesis are optional for functions with no parameters
Console.WriteLine(uc.Eval("SpreadsheetCell_A1"))
Console.WriteLine(uc.Eval("SpreadsheetCell_B2"))
Console.WriteLine(uc.Eval("SpreadsheetCell_C3"))
'// See Define() topic for more
End Sub
End Module
---- Simple function def ----
105
---- Function overloading ----
10
HaHa
Hello world!
15
---- Definition hiding/un-hiding ----
30
300
30
---- Optional parameters ----
20
35
45
---- Recursion ----
120
55
------ Bootstrapping -------
7b
0x7B
7b
------ Overwrite -------
5
50
55
-------
25
2500
2525