Hot fix: uncomment necessary error messages.

src/error.c

@@ -5,51 +5,51 @@ int errorMessage(int errorCode)
 	int returnValue=0;
 	switch(errorCode){
 	case -1:
-	//	puts("Login not successful.");
+		puts("Login not successful.");
 		returnValue = -1;
 		break;
 	case -2:
-	//	puts("Maximum number of attempts reached.");
+		puts("Maximum number of attempts reached.");
 		returnValue = -2;
 		break;
 	case -3:
-	//	puts("No menu entry available for this number.");
+		puts("No menu entry available for this number.");
 		returnValue = -3;
 		break;
 	case -4:
-	//	puts("CustomerData.* not found. Make sure that you've created an user account before logging in for the first time. Without users there is no file. Aborting!");
+		puts("CustomerData.* not found. Make sure that you've created an user account before logging in for the first time. Without users there is no file. Aborting!");
 		returnValue = -4;
 		break;
 	case -5:
-	//	puts("You should be at least 18 years old to create a bank account!");
+		puts("You should be at least 18 years old to create a bank account!");
 		returnValue = -5;
 		break;
 	case -6:
-	//	puts("Error when trying to open a file to create a customer account.");
+		puts("Error when trying to open a file to create a customer account.");
 		returnValue = -6;
 		break;
 	case -7:
-	//	puts("Forename too long. (length > 15 characters) Aborting!");
+		puts("Forename too long. (length > 15 characters) Aborting!");
 		returnValue = -7;
 		break;
 	case -8:
-	//	puts("Surname too long. (length > 15 characters) Aborting!");
+		puts("Surname too long. (length > 15 characters) Aborting!");
 		returnValue = -8;
 		break;
 	case -9:
-	//	puts("Password too long. (length > 20 characters) Aboring!");
+		puts("Password too long. (length > 20 characters) Aboring!");
 		returnValue = -9;
 		break;
 	case -10:
-	//	puts("You have entered an invalid character [ä,ö,ü, special characters] for your forename. This is not allowed. Aborting!");
+		puts("You have entered an invalid character [ä,ö,ü, special characters] for your forename. This is not allowed. Aborting!");
 		returnValue = -10;
 		break;
 	case -11:
-	//	puts("You have entered an invalid character [ä,ö,ü, special characters] for your surname. This is not allowed. Aborting!");
+		puts("You have entered an invalid character [ä,ö,ü, special characters] for your surname. This is not allowed. Aborting!");
 		returnValue = -11;
 		break;
 	case -12:
-	//	puts("You entered too many digits.");
+		puts("You entered too many digits.");
 		returnValue = -12;
 		break;
 	default: