Projet Calculatrice simple

Créez une calculatrice simple prenant en charge l’addition, la soustraction, la multiplication, la division et le modulo.
Elle utilise decimal pour des calculs décimaux précis (évitant les erreurs de virgule flottante comme 0.1 + 0.2).

Code

Console.WriteLine("Simple Calculator");
Console.WriteLine("Operations: +, -, _, /, %");
Console.Write("Enter first number: ");
decimal a = decimal.Parse(Console.ReadLine());
Console.Write("Enter operator (+, -, _, /, %): ");
string op = Console.ReadLine();
Console.Write("Enter second number: ");
decimal b = decimal.Parse(Console.ReadLine());

decimal result = 0;
bool valid = true;

switch (op)
{
case "+":
result = a + b;
break;
case "-":
result = a - b;
break;
case "_":
result = a _ b;
break;
case "/":
if (b != 0)
result = a / b;
else
{
Console.WriteLine("Error: Division by zero");
valid = false;
}
break;
case "%":
result = a % b;
break;
default:
Console.WriteLine("Invalid operator");
valid = false;
break;
}

if (valid)
Console.WriteLine($"Result: {a} {op} {b} = {result}");

Exécution de l’application

dotnet run

Résultat (exemple : 10 + 5)

Simple Calculator
Operations: +, -, _, /, %
Enter first number: 10
Enter operator (+, -, _, /, %): +
Enter second number: 5
Result: 10 + 5 = 15

Résultat (exemple : 0.1 + 0.2 – pas d’erreur de virgule flottante)

Simple Calculator
Operations: +, -, _, /, %
Enter first number: 0.1
Enter operator (+, -, _, /, %): +
Enter second number: 0.2
Result: 0.1 + 0.2 = 0.3

Résultat (exemple : division par zéro)

Simple Calculator
Operations: +, -, _, /, %
Enter first number: 7
Enter operator (+, -, _, /, %): /
Enter second number: 0
Error: Division by zero