diff --git a/src/magiceightball.c b/src/magiceightball.c
index ef45818..e49720f 100644
--- a/src/magiceightball.c
+++ b/src/magiceightball.c
@@ -2,9 +2,12 @@
 #include <stdlib.h>
 #include <time.h>
 
-int run_magiceightball() {
-
+int gib_zufallszahl_aus_16() {
     srand(time(NULL));
+    return rand() % 16;
+}
+
+int run_magiceightball() {
 
     char antwort[16][100] = {
         "Ja",
@@ -30,7 +33,7 @@ int run_magiceightball() {
     char fragesatz[100];
     fgets(fragesatz, sizeof(fragesatz), stdin);
 
-    int randomIndex = rand() % 16;
+    int randomIndex = gib_zufallszahl_aus_16();
     printf("%s\n", antwort[randomIndex]);
 
     return 0;
diff --git a/src/minirechner.c b/src/minirechner.c
index 680410b..fc6b532 100644
--- a/src/minirechner.c
+++ b/src/minirechner.c
@@ -95,22 +95,22 @@ float rest(float a, float b) {
 
 // groesster gemeinsammer Teiler
 float groesster_gemeinsammer_teiler(float a, float b) {
-    float gr, kl;
+    float gross, klein;
     float rest = 1;
     if (a > b) {
-        gr = a;
-        kl = b;
+        gross = a;
+        klein = b;
     }
     else {
-        gr = b;
-        kl = a;
+        gross = b;
+        klein = a;
     }
     while (rest != 0) {
-        rest = fmod(gr, kl);
-        gr = kl;
-        kl = rest;
+        rest = fmod(gross, klein);
+        gross = klein;
+        klein = rest;
     }
-    return gr;
+    return gross;
 }
 
 // kleinstes gemeinsammes Vielfaches