diff --git a/.gitignore b/.gitignore
index 496ee2c..dce188f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-.DS_Store
\ No newline at end of file
+.DS_Store
+.swp
diff --git a/build-project.sh b/build-project.sh
old mode 100644
new mode 100755
index c75f560..3aac8dc
--- a/build-project.sh
+++ b/build-project.sh
@@ -1,5 +1,13 @@
+trap 'echo "Interrupted"; rm main; cp employeeLogin.c.bak employeeLogin.c; rm employeeLogin.c.bak; cd ..; rm -r build/; exit' SIGINT
 clear
+ceedling test:all
 cd src/
-gcc main.c
-./a.out
-rm a.out
\ No newline at end of file
+cp employeeLogin.c employeeLogin.c.bak
+sed -i 's/src\///g' employeeLogin.c
+gcc main.c mainMenu.c -o main
+./main
+rm main
+cp employeeLogin.c.bak employeeLogin.c
+rm employeeLogin.c.bak
+cd ..
+rm -r build/
diff --git a/src/employeeList.txt b/src/employeeList.txt
new file mode 100644
index 0000000..94986be
--- /dev/null
+++ b/src/employeeList.txt
@@ -0,0 +1,12 @@
+Atharva Atharvafdai7514
+
+Can BlooMaskfdlt3817
+
+Haytham TimoDLfdai7207
+
+Julius Insertcatfdai7057
+
+Mohamed MDfdai6618
+
+Shivam Schivam007fdlt3781
+
diff --git a/src/employeeLogin.c b/src/employeeLogin.c
new file mode 100644
index 0000000..3182746
--- /dev/null
+++ b/src/employeeLogin.c
@@ -0,0 +1,132 @@
+#include "mainMenu.h"
+#include "employeeLogin.h"
+
+bool employeesAccess(char* employeesAccessCode)
+{
+
+    	return !(strcmp(employeesAccessCode,employeeAccessKey));
+
+}
+
+int checkEmployeeCredentials(char *inputUsername, char *inputPassword) 
+{
+
+    char* listUsername = malloc(credentialLength * sizeof(char*));
+    char* listPassword = malloc(credentialLength * sizeof(char*));
+
+    FILE* employeeList = fopen("src/employeeList.txt","r");
+
+    if(employeeList == NULL )
+    {
+        printf("file does not exist");
+        exit(1);	
+    }
+    else
+    { 
+    	/*loop that checks if the two strings seperated by space exist in the employee list*/
+
+        while (fscanf(employeeList, "%s %s", listUsername, listPassword) != EOF)
+        {
+    	    	
+            if (!(strcmp(inputUsername, listUsername)) && !(strcmp(inputPassword, listPassword))) 
+            {
+                fclose(employeeList);
+                return 1;
+            }
+            else if(!(strcmp(inputUsername, listUsername)) && strcmp(inputPassword, listPassword))
+            {
+                fclose(employeeList);
+                return 2;
+            }
+        }
+        fclose(employeeList);
+        return 0;
+    }
+
+    free(inputUsername);
+    free(inputPassword);
+}
+
+void getEmployeeAccessCode()
+{
+    char accessCode[10];
+
+    int remainingAttempts = 10;
+
+    printf("\n\nPlease enter the Access key : ");
+
+    while(remainingAttempts > 0)
+    {
+	    scanf("%s",accessCode);    
+       
+        if(employeesAccess(accessCode))
+        {
+	        printf("\n\nAccess granted!\n\n");
+
+            loginAsEmployee();
+	        break;
+
+        }
+
+        else
+        {
+            printf("\n\nAccess key didnt match! try again !\n\n");
+            --remainingAttempts;	    
+        }
+
+        if(remainingAttempts == 0)
+        {
+            printf("you've reached the maximum number of tries!\nplease contact an employee of a high clearance(2 or higher) \n\n");	    
+        }
+    }
+
+}
+
+void getEmployeeCredentials(char* inputUsername,char* inputPassword)
+{
+    printf("Enter username: ");
+    scanf("%s", inputUsername);
+    printf("Enter password: ");
+    scanf("%s", inputPassword);
+}
+
+void loginAsEmployee()
+{
+    int counter=3;
+    char* username = malloc(credentialLength * sizeof(char*));
+    char* password = malloc(credentialLength * sizeof(char*));
+
+    while(counter>0)
+    {
+        getEmployeeCredentials(username, password);
+
+        int checkCredentials = checkEmployeeCredentials(username,password);
+
+	    
+        if(checkCredentials == 0)
+        {
+            printf("\n\nUser not found\n\n");
+        }
+        else if(checkCredentials == 2)
+        {
+            printf("\n\nWrong Informations !\nyou have %d tries left\n\n",counter-1);
+            --counter;
+        }
+	else
+	{
+            printf("\n\nUser Approved\n\n");
+            break;
+        }
+    }
+
+    if(counter==0)
+    {
+
+        printf("you used up all of the tries! account locked\nPlease contact an employee of higher  clearance !\n\n");
+
+    }
+
+    free(username);
+    free(password);
+
+}
diff --git a/src/employeeLogin.h b/src/employeeLogin.h
new file mode 100644
index 0000000..d6f3314
--- /dev/null
+++ b/src/employeeLogin.h
@@ -0,0 +1,18 @@
+#ifndef LOGINEMPLOYEE_H_
+#define LOGINEMPLOYEE_H_
+
+#define employeeAccessKey "DF9E9A8B5E"
+#define credentialLength  20
+
+#include<stdbool.h>
+
+bool employeesAccess(char* employeesAccessCode);
+
+int checkEmployeeCredentials(char* username , char* password);
+
+void getEmployeeCredentials(char* username, char* password);
+void loginAsEmployee();
+
+#endif
+
+
diff --git a/src/main.c b/src/main.c
index a6b9b24..7032d5b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,6 +1,9 @@
-#include <stdio.h>
+#include "mainMenu.h"
 
-int main() {
+int main()
+{
+
+    ageInput();
     
     return 0;
-}
\ No newline at end of file
+}
diff --git a/src/mainMenu.c b/src/mainMenu.c
new file mode 100644
index 0000000..b2d8243
--- /dev/null
+++ b/src/mainMenu.c
@@ -0,0 +1,133 @@
+#include "mainMenu.h"
+
+#include "employeeLogin.c"
+
+bool agePermission(int age)
+{
+
+    return age >= 18;
+
+}
+
+bool checkIfInteger(char* userInput)
+{
+
+    char *endPointer;
+
+    /*the endPointer points to the first non-integer character signaled to stop conversion*/
+
+    strtol(userInput, &endPointer, 10);
+
+    return !(endPointer == userInput || *endPointer != '\0');
+
+}
+
+bool chooseOption(int choiceInput)
+{
+
+    return !(choiceInput < 1 || choiceInput > 4);
+
+}
+
+void ageInput()
+{
+
+    char* userInput = malloc(20*sizeof(char*));
+    char* userInputPointer;
+
+    long age;
+
+    printf("\nPlease specify your age : ");
+    scanf("%s",userInput);
+
+
+    while (true)
+    {
+	/*the userInput string is changed to a number with the strtol function*/
+
+	age = strtol(userInput,&userInputPointer,10);
+
+        if((checkIfInteger(userInput))&& (agePermission(age)))
+	{
+
+	    printf("Access granted!\n\n\n\n");
+
+	    showMenu();
+
+            menuInput();
+
+	    break;
+
+	}
+
+	else if((checkIfInteger(userInput)) && !(agePermission(age))) 
+	{
+
+            printf("You should be at least 18 years old to create a bank account!\n");
+
+	    break;
+
+	}
+
+	else
+	{
+	    printf("input invalid! try again!\n");
+
+            scanf("%s",userInput);
+
+	}
+    
+    
+}
+}
+
+void menuInput()
+{
+    char choiceInput[20];
+    char* choiceInputPointer;
+    int selection;
+    
+    scanf("%s", choiceInput);
+    selection = strtol(choiceInput, &choiceInputPointer, 10);
+    
+    while (!checkIfInteger(choiceInput) || !chooseOption(selection)) 
+    {
+        printf("Input invalid! try again!\n");
+
+        scanf("%s", choiceInput);
+
+        selection = strtol(choiceInput, &choiceInputPointer, 10);
+    }
+    
+    switch(selection) 
+    {
+        case 1 : printf("\nLoginAsCostumer() function will be implemented here soon\n\n");
+                 break;
+
+        case 2 : printf("\ncreateCostumerAccount() function will be implemented here soon\n\n"); 
+                 break;
+
+        case 3 : getEmployeeAccessCode();
+                 break;
+
+        case 4 : printf("\e[1;1H\e[2J"); 
+                 printf("\nsee you next time !\n\n"); 
+                 break;
+    }     	
+}
+
+
+void showMenu()
+{
+
+    printf("\t\t\t\t\t\t\t  Welcome to Bank Manager!");
+    printf("\n\n\n\n\t\t\t\t\t\tPlease select one of the following functions!");
+    printf("\n\n\n\n\t\t\t\t\t\t      ->Login as an existing costumer.");
+    printf("\n\n\t\t\t\t\t\t        ->Register as a new costumer.");
+    printf("\n\n\t\t\t\t\t\t           ->Login as an Employee.");
+    printf("\n\n\t\t\t\t\t\t\t\t ->Exit.\n");
+    printf("\n\n\n\n\n Selection :\n");
+
+}
+
+
diff --git a/src/mainMenu.h b/src/mainMenu.h
new file mode 100644
index 0000000..17d81bc
--- /dev/null
+++ b/src/mainMenu.h
@@ -0,0 +1,20 @@
+#ifndef MAINMENU_H_
+#define MAINMENU_H_
+
+#include<stdio.h>
+#include<stdlib.h>
+#include<stdbool.h>
+#include<string.h>
+
+#define credentialLength 20
+
+bool agePermission(int age);
+bool checkIfInteger(char* userInput);
+bool chooseOption(int choiceInput);
+
+void ageInput();
+void showMenu();
+void menuInput();
+
+#endif
+
diff --git a/test/support/.gitkeep b/test/support/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/test/test_employeeLogin.c b/test/test_employeeLogin.c
new file mode 100644
index 0000000..8860af5
--- /dev/null
+++ b/test/test_employeeLogin.c
@@ -0,0 +1,147 @@
+#ifdef TEST
+
+#include "unity.h"
+
+#include "employeeLogin.h"
+
+void setUp(void)
+{
+}
+
+void tearDown(void)
+{
+}
+
+void test_SuccessfulLoginEmployee_(void)
+{
+
+    //test case : 0	
+	
+    /*Arrange*/
+
+    char* validEmployeesCredentials[][2] = {
+	                                                  {"Atharva", "Atharvafdai7514"},
+							  {"Can", "BlooMaskfdlt3817"},
+							  {"Haytham", "TimoDLfdai7207"},
+							  {"Julius", "Insertcatfdai7057"},
+							  {"Mohamed", "MDfdai6618"},
+							  {"Shivam", "Schivam007fdlt3781"}
+						     };
+    /*Act and Assert*/
+    
+    int expected[] = {1,1,1,1,1,1};
+
+    for(int i=0; i<6; i++)
+    {
+
+        int result = checkEmployeeCredentials(validEmployeesCredentials[i][0], validEmployeesCredentials[i][1]);
+
+        TEST_ASSERT_EQUAL_INT(expected[i],result);
+
+    }
+
+
+
+
+}
+
+void test_WrongInfosLoginEmployee(void)
+{
+    //test case : 1
+    /*Arrange*/
+   
+    char* wrongEmployeesCredentials[][2] = {
+	                                                     {"Atharva", "doe"},
+							     {"Can", "Bar"},
+							     {"Haytham", "buzz"},
+							     {"Julius", "fizz"},
+							     {"Mohamed", "muster"},
+							     {"Shivam", "TimoDL"}
+					                 };
+
+    /*Act and Assert*/    
+
+     int expected[] = {2,2,2,2,2,2};
+
+     for(int i=0; i<6; i++)
+     {
+
+         int result = checkEmployeeCredentials(wrongEmployeesCredentials[i][0], wrongEmployeesCredentials[i][1]);
+
+	 TEST_ASSERT_EQUAL_INT(expected[i],result);
+
+     }
+
+}
+
+
+
+
+void test_MissingLoginEmployee(void)
+{
+
+    //test case : 2	
+    /*Arrange*/
+    
+    char* missingEmployeesCredentials[][2] = {
+                                                       {"John", "doe"},
+	                                               {"Jane", "Doe"},
+	                                               {"Foo", "Bar"},
+	                                               {"Fizz", "Buzz"},
+	                                               {"Musterman", "Mustermanpassword"},
+	                                               {"Musterfrau", "Musterfraupassword"}                                                                                                         
+    						   };
+
+    int expected[] = {0,0,0,0,0,0};
+
+    /*Act and Assert*/
+    
+    for(int i=0; i<6; i++)
+    {
+    
+        int result = checkEmployeeCredentials(missingEmployeesCredentials[i][0], missingEmployeesCredentials[i][1]);
+    
+        TEST_ASSERT_EQUAL_INT(expected[i],result);
+    
+    } 
+
+    
+}
+
+void test_validEmployeeAccessCode(void)
+{
+    //test case 0
+
+    /*Arrange*/
+
+    char validAccesscode[11] = "DF9E9A8B5E";
+
+    /*Act*/
+    bool validAccessCodeResult = employeesAccess(validAccesscode);
+
+    /*Assert*/
+
+    TEST_ASSERT_TRUE(validAccessCodeResult);
+
+}
+
+void test_invalidEmployeeAccessCode(void)
+{
+    //test case 1
+
+    /*Arrange*/
+
+    char* invalidAccessCode[] = {"15","foo","fizz","buzz","fizzbuzz","test","bankmanagement"};
+    bool invalidCodeExpectation = false;
+
+    /*Act and assert*/ 
+
+    for(int i=0;i<7;i++)
+    {	    
+        bool invalidCodeResults = employeesAccess(invalidAccessCode[i]);   
+        TEST_ASSERT_EQUAL(invalidCodeExpectation,invalidCodeResults);	    
+    } 
+
+}
+
+#endif // TEST
diff --git a/test/test_mainMenu.c b/test/test_mainMenu.c
new file mode 100644
index 0000000..4883180
--- /dev/null
+++ b/test/test_mainMenu.c
@@ -0,0 +1,219 @@
+#ifdef TEST
+
+#include "unity.h"
+
+#include "mainMenu.h"
+
+void setUp(void)
+{
+
+}
+
+void tearDown(void)
+{
+
+}
+
+void test_agePermissionValidAge(void)
+{   
+    //Test case : 0
+
+    /*Arrange*/
+
+    int Age = 18;
+
+    bool validAgeResult[83];
+
+    /*Act*/
+
+    for(int i =0; i < 83; i++){
+
+        validAgeResult[i]= agePermission(Age + i);
+    }
+
+
+    /*Assert*/
+
+    for(int i=0; i < 83; i++){
+
+        TEST_ASSERT_TRUE(validAgeResult[i]);
+
+    }
+    
+}
+
+void test_agePermissionInvalidAge(void)
+{
+
+    //Test case : 1
+
+    /*Arrange*/
+
+    int invalidAge[117];
+
+    bool invalidAgeResult[117];
+
+
+    for(int i =-100; i < 18; i++)
+    {
+
+        invalidAge[i+100]= i;
+    }
+
+    /*Act*/
+
+    for(int i=0; i < 117; i++)
+    {
+
+        invalidAgeResult[i] = agePermission(invalidAge[i]);
+
+    }
+
+    /*Assert*/
+
+    for(int i=0; i < 117; i++)
+    {
+
+        TEST_ASSERT_FALSE(invalidAgeResult[i]);
+
+    }	    
+	    
+}
+
+void test_IsInteger(void)
+{
+
+    //test case 0
+
+    /*Arrange*/
+
+    char* inputIsInteger[] = {"-10000000","-2000000","-354698","-66667","-7878","-987","-64","-5","0","1","2","10","201","333","4321","56974","698751","7878989","88954621" };
+
+    bool inputIsIntegerExpected = true;
+
+    /*Act and Assert*/
+
+    for(int i=0; i < 19; i++)
+    {
+        bool inputIsIntegerResult = checkIfInteger(inputIsInteger[i]);
+
+        TEST_ASSERT_EQUAL(inputIsIntegerExpected,inputIsIntegerResult);
+
+    }    
+
+}
+
+void test_IsNotInteger(void)
+{
+    //test case 1
+
+    /*Arrange*/
+
+    char* inputIsNotInteger[] = {"0.15","3.141592653589793238","5.3254f","-6.264","-7878.3261","foo","Bar","FIZZ","buzZ","joHN","jAnE","foo-bar","3,15","2k13",""," ","-","+","/*-+.,/=" };
+
+    bool inputIsNotIntegerExpected = false;
+
+    /*Act and Assert*/
+
+
+    for(int i=0; i<19; i++)
+    {
+        bool inputIsNotIntegerResult = checkIfInteger(inputIsNotInteger[i]);
+
+        TEST_ASSERT_EQUAL(inputIsNotIntegerExpected,inputIsNotIntegerResult);
+
+    }
+
+	    
+}
+void test_validChoiceInput(void)
+{
+    //test case 0	
+
+    /*Arrange*/
+
+    int validInput[4];
+
+    bool validInputExpected = true;
+
+    
+
+    for(int i = 0; i < 4; i++)
+    {
+        validInput[i] = i + 1;	    
+    }
+
+    /*Act and Asssert*/
+
+    for(int i = 0; i < 4; i++)
+    {
+
+        bool validInputResult = chooseOption(validInput[i]);
+
+        TEST_ASSERT_EQUAL(validInputExpected,validInputResult);	
+    }
+
+}
+
+void test_invalidChoiceInput_firstCase(void)
+{   
+    // test case 1
+
+    /*Arrange*/
+
+    int invalidInput[100];
+
+    bool invalidInputExpected = false;
+
+    
+
+    for(int i = -100; i < 1; i++)
+    {
+        invalidInput[i+100] = i;	    
+    }
+
+    /*Act and Assert*/
+
+    for(int i = 0; i < 100; i++)
+    {
+
+        bool invalidInputResult = chooseOption(invalidInput[i]);
+
+        TEST_ASSERT_EQUAL(invalidInputExpected,invalidInputResult);	
+
+    }
+
+}
+
+void test_invalidChoiceInput_secondCase(void)
+{
+    // test case 2
+
+    /*Arrange*/
+
+    int invalidInput[100];
+
+    bool invalidInputExpected = false;
+
+    for(int i = 0; i < 100; i++)
+    {
+        invalidInput[i] = i + 5;	    
+    }
+
+    /*Act and Assert*/
+
+    for(int i = 0; i < 100; i++)
+    {
+        bool invalidInputResult = chooseOption(invalidInput[i]);
+
+        TEST_ASSERT_EQUAL(invalidInputExpected,invalidInputResult);	
+    }
+
+
+}
+
+
+
+
+
+#endif // TEST