calculate() Methode ergänzt

Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java

@@ -3,6 +3,7 @@ package de.hs_mannheim.informatik.spreadsheet;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.PrintWriter;
+import java.sql.SQLOutput;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -110,7 +111,8 @@ public class Spreadsheet {
 
 	/**
 	 * This method does the actual evaluation/calcluation of a specific cell
-	 * @param cellName the name of the cell to be evaluated
+	 * @param row the row of the cell to be evaluated
+	 * @param col the col of the cell to be evaluated
 	 * @return Nothing.
 	 */
 	private void evaluateCell(int row, int col) {
@@ -165,17 +167,50 @@ public class Spreadsheet {
 		Matcher m = Pattern.compile("([A-Z][0-9]*)|[-\\+\\*/]|[0-9]*").matcher(formula);
 
 		long res = 0;
+		char operator = '+';
 
-		// TODO implement
-
-		// uncomment the following to see an example how the elements of a formula can be accessed
-		while (m.find()) {        // m.find() must always be used before m.group()
+		while (m.find()) {
 			String s = m.group();
-			if (!s.isEmpty()) {
-				System.out.println(s);
+			long value;
+
+			if(s.isEmpty()){
+				continue;
+			}
+
+			System.out.println("Beginning of loop " + s);
+			if (!(s.matches("[-\\+\\*/]"))) {
+				if(s.matches("[A-Z][0-9]*")) {
+					int col = this.getCol(s);
+					int row = this.getRow(s);
+
+					String cellValue = cells[row][col].getValue();
+					value = Long.parseLong(cells[row][col].getValue());
+
+				}else{
+					System.out.println("in number in try");
+					value = Long.parseLong(s);
+				}
+
+				switch(operator) {
+					case '+':
+						res += value;
+						break;
+					case '-':
+						res -= value;
+						break;
+					case '*':
+						res *= value;
+						break;
+					case '/':
+						if (res != 0) {
+							res /= value;
+							break;
+						}
+				}
+			}else{
+				operator = s.charAt(0);
 			}
 		}
-
 		return res;
 	}