diff --git a/src/ggT/main.c b/src/ggT/main.c
new file mode 100644
index 0000000..e9bc365
--- /dev/null
+++ b/src/ggT/main.c
@@ -0,0 +1,14 @@
+#include "ggT.h"
+#include "../userinput.h"
+#include <stdio.h>
+
+int main(){
+    printf("Please add the two numbers you want the ggT of:\n");
+    int firstNum = usergetd("first number: ", 0, NULL);
+    int secondNum = usergetd("second number: ", 0, NULL);
+    int result = ggT(firstNum, secondNum);
+    printf("The ggT of %d and %d is: %d\n", firstNum, secondNum, result);
+
+    return 0;
+}
+
diff --git a/test/ggT/test_ggT.c b/test/ggT/test_ggT.c
index 6c14258..7e4beec 100644
--- a/test/ggT/test_ggT.c
+++ b/test/ggT/test_ggT.c
@@ -5,66 +5,21 @@ void setUp(){}
 void tearDown(){}
 
 void test_ggTOf5And10(){
-    //arrange
-    int a = 5;
-    int b = 10;
-    int expected = 5;
-
-    //act
-    int result = ggT(a,b);
-
-    //assert
-    TEST_ASSERT_EQUAL_INT(expected, result);
+    TEST_ASSERT_EQUAL_INT(5, ggT(5, 10));
 }
 
 void test_ggTOfFirstNumberZero(){
-    //arrange
-    int a = 0;
-    int b = 5;
-    int expected = 5;
-
-    //act
-    int result = ggT(a,b);
-
-    //assert
-    TEST_ASSERT_EQUAL_INT(expected, result);
+    TEST_ASSERT_EQUAL_INT(5, ggT(0, 5));
 }
 
 void test_ggTOfSecondNumberZero(){
-    //arrange
-    int a = 10;
-    int b = 0;
-    int expected = 10;
-
-    //act
-    int result = ggT(a,b);
-
-    //assert
-    TEST_ASSERT_EQUAL_INT(expected, result);
+    TEST_ASSERT_EQUAL_INT(10, ggT(10, 0));
 }
 
 void test_ggTOfBothNumbersZero(){
-    //arrange
-    int a = 0;
-    int b = 0;
-    int expected = 0;
-
-    //act
-    int result = ggT(a,b);
-
-    //assert
-    TEST_ASSERT_EQUAL_INT(expected,result);
+    TEST_ASSERT_EQUAL_INT(0, ggT(0, 0));
 }
 
 void test_ggTOfCoprimes(){
-    //arrange
-    int a = 13;
-    int b = 27;
-    int expected = 1;
-
-    //act
-    int result = ggT(a,b);
-
-    //assert
-    TEST_ASSERT_EQUAL_INT(expected,result);
+    TEST_ASSERT_EQUAL_INT(1, ggT(13, 27));
 }
\ No newline at end of file