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