The complete financial DSL processing a multi-line script of deposits, withdrawals, and interest calculation.

ID: 1331

See: Project: Creating a Simple DSL for Financial Transactions 
				
					using uCalcSoftware;

var uc = new uCalc();
// 1. Initialize the account balance
uc.DefineVariable("balance = 0.0");

// 2. Define the DSL rules on the expression transformer
var t = uc.ExpressionTransformer;
t.FromTo("DEPOSIT {@Number:amount}", "balance = balance + {amount}");
t.FromTo("WITHDRAW {@Number:amount}", "balance = balance - {amount}");
t.FromTo("INTEREST {@Number:rate}", "balance = balance * (1 + {rate} / 100.0)");

// 3. Define the multi-line transaction script
var script = """

DEPOSIT 1000.00
WITHDRAW 50.75
INTEREST 0.5
WITHDRAW 200.00

""";

Console.WriteLine($"Initial Balance: {uc.Eval("balance")}");
Console.WriteLine("Processing script...");

// 4. Evaluate the entire script.
// Note: EvalStr returns the result of the LAST line.
// The intermediate lines modify the 'balance' variable.
uc.EvalStr(script);

// 5. Get the final balance
Console.WriteLine($"Final Balance: {uc.EvalStr("balance")}");
				
			
Initial Balance: 0
Processing script...
Final Balance: 753.99625
Explore 600+ other examples
				
					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   // 1. Initialize the account balance
   uc.DefineVariable("balance = 0.0");

   // 2. Define the DSL rules on the expression transformer
   auto t = uc.ExpressionTransformer();
   t.FromTo("DEPOSIT {@Number:amount}", "balance = balance + {amount}");
   t.FromTo("WITHDRAW {@Number:amount}", "balance = balance - {amount}");
   t.FromTo("INTEREST {@Number:rate}", "balance = balance * (1 + {rate} / 100.0)");

   // 3. Define the multi-line transaction script
   auto script = R"(
DEPOSIT 1000.00
WITHDRAW 50.75
INTEREST 0.5
WITHDRAW 200.00
)";

   cout << "Initial Balance: " << uc.Eval("balance") << endl;
   cout << "Processing script..." << endl;

   // 4. Evaluate the entire script.
   // Note: EvalStr returns the result of the LAST line.
   // The intermediate lines modify the 'balance' variable.
   uc.EvalStr(script);

   // 5. Get the final balance
   cout << "Final Balance: " << uc.EvalStr("balance") << endl;
}
				
			
Initial Balance: 0
Processing script...
Final Balance: 753.99625
Explore 600+ other examples
				
					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      '// 1. Initialize the account balance
      uc.DefineVariable("balance = 0.0")
      
      '// 2. Define the DSL rules on the expression transformer
      Dim t = uc.ExpressionTransformer
      t.FromTo("DEPOSIT {@Number:amount}", "balance = balance + {amount}")
      t.FromTo("WITHDRAW {@Number:amount}", "balance = balance - {amount}")
      t.FromTo("INTEREST {@Number:rate}", "balance = balance * (1 + {rate} / 100.0)")
      
      '// 3. Define the multi-line transaction script
      Dim script = "
DEPOSIT 1000.00
WITHDRAW 50.75
INTEREST 0.5
WITHDRAW 200.00
"
      
      Console.WriteLine($"Initial Balance: {uc.Eval("balance")}")
      Console.WriteLine("Processing script...")
      
      '// 4. Evaluate the entire script.
      '// Note: EvalStr returns the result of the LAST line.
      '// The intermediate lines modify the 'balance' variable.
      uc.EvalStr(script)
      
      '// 5. Get the final balance
      Console.WriteLine($"Final Balance: {uc.EvalStr("balance")}")
   End Sub
End Module
				
			
Initial Balance: 0
Processing script...
Final Balance: 753.99625
Explore 600+ other examples