diff --git a/src/funktion.c b/src/funktion.c
index 7841df3..219e073 100644
--- a/src/funktion.c
+++ b/src/funktion.c
@@ -216,3 +216,12 @@ float Vmiddle3(float x3, float z3) {
     result = result * 0.5;
     return result;
 }
+float Vskalort(float x1, float x2, float x3, float z1, float z2, float z3) {
+    float E;
+    E = x1 * z1 + x2 * z2 + x3 * z3;
+    if (E == 0) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
diff --git a/src/funktion.h b/src/funktion.h
index e4e082d..9032e72 100644
--- a/src/funktion.h
+++ b/src/funktion.h
@@ -38,5 +38,6 @@ double Vparallel(double x1, double x2, double x3, double z1, double z2, double z
 float Vmiddle(float x1, float z1);
 float Vmiddle2(float x2, float z2);
 float Vmiddle3(float x3, float z3);
+float Vskalort(float x1, float x2, float x3, float z1, float z2, float z3);
 
 #endif
diff --git a/src/main.c b/src/main.c
index 8292665..e6a22e9 100644
--- a/src/main.c
+++ b/src/main.c
@@ -164,4 +164,21 @@ int main()
     x3 = getValue('X');
     z3 = getValue('Z');
     Vmiddle3(x3, z3);
+
+    printf("1. Vektor\n");
+    printf("x eingeben");
+    x1 = getValue('X');
+    printf("y eingeben ");
+    x2 = getValue('X');
+    printf("z eingeben");
+    x3 = getValue('X');
+
+    printf("2. Vektor\n");
+    printf("a eingeben");
+    z1 = getValue('Z');
+    printf("b eingeben ");
+    z2 = getValue('Z');
+    printf("c eingeben");
+    z3 = getValue('Z');
+    Vskalort(x1, x2, x3, z1, z2, z3);
 }