diff --git a/src/funktion.c b/src/funktion.c
index 75b50e2..34eb7e6 100644
--- a/src/funktion.c
+++ b/src/funktion.c
@@ -149,3 +149,7 @@ float Vsubstract(float x1, float z1) {
     double result = x1 - z1;
     return result;
 }
+float Vsubstract2(float x2, float z2) {
+    double result = x2 - z2;
+    return result;
+}
diff --git a/src/funktion.h b/src/funktion.h
index 6cda55b..28391b8 100644
--- a/src/funktion.h
+++ b/src/funktion.h
@@ -29,5 +29,6 @@ float Vadd(float x1, float z1);
 float Vaddx2(float x2, float z2);
 float Vaddx3(float x3, float z3);
 float Vsubstract(float x1, float z1);
+float Vsubstract2(float x2, float z2);
 
 #endif
diff --git a/src/main.c b/src/main.c
index 4ad9296..a8e8a0d 100644
--- a/src/main.c
+++ b/src/main.c
@@ -124,4 +124,10 @@ int main()
     x1 = getValue('x');
     z1 = getValue('z');
     Vsubstract(x1, z1);
+
+    printf("y eingeben ");
+    x2 = getValue('X');
+    printf("b eingeben");
+    z2 = getValue('z');
+    Vsubstract2(x2, z2);
 }