Add solution for input test.

02_strings/eingabe.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include <string.h>
+#include "eingabe.h"
+
+int gibTextEin(const char *promptText, char *puffer, unsigned int pufferLen)
+{
+    printf(promptText);
+    if(fgets(puffer, pufferLen, stdin) != NULL)
+    {
+        if(puffer[strlen(puffer)-1] == '\n')
+            puffer[strlen(puffer)-1] = '\0';
+        else
+            while(getchar() != '\n') {}
+
+        return 1;
+    }
+
+    return 0;
+}

02_strings/eingabe.h

@@ -0,0 +1 @@
+int gibTextEin(const char *promptText, char *puffer, unsigned int pufferLen);