added geradengleichung

inputOutputFlanagan/geradengleichung.java

@@ -0,0 +1,34 @@
+import java.util.Arrays;
+import javax.swing.table.*;
+import java.lang.Math;
+
+public class geradengleichung {
+
+    static void errorExit(String errorMsg) {
+        System.out.println("Error: " + errorMsg);
+        System.exit(1);
+    }
+    
+    public static void main(String args[]) {
+        if (args.length != 4) {
+            errorExit("please provide 4 commandline arguments");
+        }
+
+    int Px = 0, Py = 0, Qx = 0, Qy = 0;
+    try {
+        Px = Integer.parseInt(args[0]);
+        Py = Integer.parseInt(args[1]);
+        Qx = Integer.parseInt(args[2]);
+        Qy = Integer.parseInt(args[3]);
+    } catch (NumberFormatException e) {
+        errorExit("please only provide integer input");
+    }
+
+    double delta_y = Math.abs(Py-Qy);
+    double delta_x = Math.abs(Px-Qx); 
+    double a = delta_y / delta_x;
+    double b = Math.min(Py, Qy);
+    
+    System.out.printf("f(x) = %fx + %f\n", a, b);
+    }
+}