Simulates the core logic of a calculator, showing how user input is built into an expression string and evaluated.
ID: 1365
using uCalcSoftware;
var uc = new uCalc();
string display_text = "";
// Simulate user pressing buttons: 1, 2, 3, +, 4, 5, 6
display_text = display_text + "123";
Console.WriteLine($"Display: {display_text}");
display_text = display_text + "+";
Console.WriteLine($"Display: {display_text}");
display_text = display_text + "456";
Console.WriteLine($"Display: {display_text}");
// Simulate pressing '='. This is where uCalc does the work.
var result = uc.EvalStr(display_text);
display_text = result;
Console.WriteLine($"Result: {display_text}");
Console.WriteLine("");
// Simulate a new calculation with an error
display_text = "5 * / 3";
Console.WriteLine($"Display: {display_text}");
result = uc.EvalStr(display_text);
display_text = result;
Console.WriteLine($"Result: {display_text}");
Console.WriteLine("");
// Simulate clearing the display
display_text = "C"; // Let's say 'C' is a special command
if (display_text == "C") {
display_text = "";
}
Console.WriteLine($"Display after clear: '{display_text}'");
Display: 123
Display: 123+
Display: 123+456
Result: 579
Display: 5 * / 3
Result: Syntax error
Display after clear: ''
#include <iostream>
#include "uCalc.h"
using namespace std;
using namespace uCalcSoftware;
int main() {
uCalc uc;
string display_text = "";
// Simulate user pressing buttons: 1, 2, 3, +, 4, 5, 6
display_text = display_text + "123";
cout << "Display: " << display_text << endl;
display_text = display_text + "+";
cout << "Display: " << display_text << endl;
display_text = display_text + "456";
cout << "Display: " << display_text << endl;
// Simulate pressing '='. This is where uCalc does the work.
auto result = uc.EvalStr(display_text);
display_text = result;
cout << "Result: " << display_text << endl;
cout << "" << endl;
// Simulate a new calculation with an error
display_text = "5 * / 3";
cout << "Display: " << display_text << endl;
result = uc.EvalStr(display_text);
display_text = result;
cout << "Result: " << display_text << endl;
cout << "" << endl;
// Simulate clearing the display
display_text = "C"; // Let's say 'C' is a special command
if (display_text == "C") {
display_text = "";
}
cout << "Display after clear: '" << display_text << "'" << endl;
}
Display: 123
Display: 123+
Display: 123+456
Result: 579
Display: 5 * / 3
Result: Syntax error
Display after clear: ''
Imports System
Imports uCalcSoftware
Public Module Program
Public Sub Main()
Dim uc As New uCalc()
Dim display_text As String = ""
'// Simulate user pressing buttons: 1, 2, 3, +, 4, 5, 6
display_text = display_text + "123"
Console.WriteLine($"Display: {display_text}")
display_text = display_text + "+"
Console.WriteLine($"Display: {display_text}")
display_text = display_text + "456"
Console.WriteLine($"Display: {display_text}")
'// Simulate pressing '='. This is where uCalc does the work.
Dim result = uc.EvalStr(display_text)
display_text = result
Console.WriteLine($"Result: {display_text}")
Console.WriteLine("")
'// Simulate a new calculation with an error
display_text = "5 * / 3"
Console.WriteLine($"Display: {display_text}")
result = uc.EvalStr(display_text)
display_text = result
Console.WriteLine($"Result: {display_text}")
Console.WriteLine("")
'// Simulate clearing the display
display_text = "C" '// Let's say 'C' is a special command
If display_text = "C" Then
display_text = ""
End If
Console.WriteLine($"Display after clear: '{display_text}'")
End Sub
End Module
Display: 123
Display: 123+
Display: 123+456
Result: 579
Display: 5 * / 3
Result: Syntax error
Display after clear: ''