diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7d759b2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+1_Grundlagen/code/matrix.exe
diff --git a/1_Grundlagen/code/matrix.cpp b/1_Grundlagen/code/matrix.cpp
index f97cee6..41e02ad 100644
--- a/1_Grundlagen/code/matrix.cpp
+++ b/1_Grundlagen/code/matrix.cpp
@@ -1,42 +1,45 @@
-#include<stdio.h>
-#include<stdlib.h>
+#include <stdio.h>
+#include <stdlib.h>
 
 int main()
 {
-	const int nx=3; 
-	const int ny=2;
-    const int nz=3;
-	int*** matrix;
-	
-	matrix = (int***)malloc((ny*sizeof(int**)*nz*sizeof(int)));
-    for (int z=0; z<nz;z++) 
-    {
-        matrix[z] = (int**)malloc(ny*sizeof(int*));
-        for(int y=0; y<ny; y++)
-	    {
-		    matrix[y] = (int**)malloc(nx*sizeof(int));
-		    for(int x=0; x<nx; x++)
-		    {
-		    	matrix[z][y][x] = (z+1) * 100 + (y+1)*10 + x+1;
-		    }
-	    }
-    }
-    for(int z=0; z<nz; z++)
-    {
-	    for(int y=0; y<ny; y++)
-	    {
-	    	for(int x=0; x<nx; x++)
-		    {
-			    printf("%i ",matrix[z][y][x]);
-		    }
-		    printf("\n");
-	    }
-        printf("\n");
-    }
+	const int nx = 1;
+	const int ny = 2;
+	const int nz = 3;
+	int ***matrix;
 
-	for(int z=0; z<ny; z++)
+	matrix = (int ***)malloc(nz * sizeof(int **));
+	for (int z = 0; z < nz; z++)
 	{
+		matrix[z] = (int **)malloc(ny * sizeof(int *));
+		for (int y = 0; y < ny; y++)
+		{
+			matrix[z][y] = (int *)malloc(nx * sizeof(int));
+			for (int x = 0; x < nx; x++)
+			{
+				matrix[z][y][x] =(z + 1) * 100 + (y + 1) * 10 + x + 1;
+			}
+		}
+	}
+	for (int z = 0; z < nz; z++)
+	{
+		for (int y = 0; y < ny; y++)
+		{
+			for (int x = 0; x < nx; x++)
+			{
+				printf("%i ", matrix[z][y][x]);
+			}
+			printf("\n");
+		}
+	}
+
+	for (int z = 0; z < nz; z++)
+	{
+		for (int y = 0; y < ny; y++)
+		{
+			free(matrix[z][y]);
+		}
 		free(matrix[z]);
-	}	
+	}
 	free(matrix);
 }