implement the main menu

src/mainMenu.c

@@ -0,0 +1,93 @@
+
+#include"mainMenu.h"
+
+
+bool agePermission(int age){
+
+    if(age >= 18)
+    {
+
+       return true;
+
+    }
+
+    else
+    {
+
+       return false;
+
+    }
+
+}
+
+bool checkIfInteger(char* input){
+
+    char *end_pointer;
+
+    strtol(input, &end_pointer, 10);
+
+    if (end_pointer == input || *end_pointer != '\0')
+    {
+
+        return false;
+
+    }
+
+    else
+    {
+
+        return true;
+
+    }
+}
+
+void ageInput(){
+
+    char input[20];
+    char* input_pointer;
+
+    long age;
+
+    printf("\nPlease specify your age : ");
+    scanf("%s",input);
+
+    if (checkIfInteger(input) == true )
+    {
+        age = strtol(input,&input_pointer,10);
+
+        if(agePermission(age)== true)
+	{
+            printf("Access granted!\n\n\n\n");
+
+            showMenu();
+
+        }
+	else if(agePermission(age)== false)
+	{
+
+                  printf("You should be at least 18 years old to create a bank account!\n");
+
+        }
+    }
+
+    else
+    {
+
+                  printf("input invalid! try again!\n");
+
+    }
+
+}
+
+
+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");
+
+}

src/mainMenu.h

@@ -0,0 +1,15 @@
+#ifndef MAINMENU_H_
+#define MAINMENU_H_
+
+#include<stdio.h>
+#include<stdlib.h>
+#include<stdbool.h>
+#include<string.h>
+
+void showMenu();
+void ageInput();
+
+bool agePermission(int age);
+bool checkIfInteger(char* input);
+
+#endif

src/run_BankManagementSimulator.c

@@ -0,0 +1,8 @@
+#include"mainMenu.h"
+
+int main()
+{
+
+    ageInput();	
+
+}