Question

Create a class named UserAccounts that defines an array of 8 accounts as an instance variable. In the default constructor of this class, write a loop that creates 8 accounts with ids 1 through 7 and initial balance of $50 for each account. Store these accounts in the array.
When the program runs, it asks the use to enter a specific id. When the user enters a correct id, the system displays a menu as shown in the sample run below. The menu options are self explanatory. Option 4 exits the main menu. So if option 4 was chosen, the system will prompt the use again to enter another id. This means that the system will keep running indefinitely.

Sample Run:

Enter an id: 3 Main menu 1: check balance 2: withdraw 3 deposit 4:exit Enter a choice: 1 The balance is 5Θ.Θ Main menu 1: check balance 2: withdraw 3 deposit 4: exit Enter a choice: 2 Enter an amount to withdraw: 25 Main menu 1: check balance 2: withdraw 3 deposit 4: exit Enter a choice: 1 The balance is 25.Θ Main menu 1: check balance 2: withdraw 3 deposit 4: exit Enter a choice: 3 Enter an amount to deposit: 1Θ Main menu 1: check balance 2: withdraw 3 deposit 4: exit Enter a choice: 1 The balance is 35.e Main menu 1: check balance 2: withdraw 3: deposit 4: exit Enter a choice: 4 Enter an id:

Answer 1

I was using GCC so i could not use cin and cout functions, instead i have used printf and scanf. You can change the same if you want to:

Source Code:

#include<stdio.h>

class UserAccounts{

   public:
       int id;
       double balance;
      
};

int main(){
   UserAccounts customer[8];
   int i, custId, choice;
   double remBal;
   char ch;
   for(i = 0 ; i < 8 ; i++){
       customer[i].id = i+1;
       customer[i].balance = 50.0;
   }
  
       printf( "Enter id: ");
       scanf( "%d",&custId);
      
       if(custId < 0 || custId > 9){
           printf( "Invalid id !");
           return -1;
       }
      
   do{  
       double withdraw, deposit;
       printf( "Main Menu\n1. Check balance\n2.Withdraw\n3.Deposit \n4.Exit\nEnter a choice: ");
       scanf( "%d", &choice);
       printf("\n");
      
       switch(choice){
           case 1:
               printf( "The balance is: %.2lf" , customer[custId].balance);
               break;
              
           case 2:
               printf( "Enter an amount to withdraw: ");
               scanf( "%lf", &withdraw);
               remBal = customer[custId].balance - withdraw;
               if(remBal < 0){
                   printf("Insufficient balance !!");
                   break;
               }else{
                   customer[custId].balance -= withdraw;
               }
               break;
              
           case 3:
               printf( "Enter amount you want to deposit:" );
               scanf( "%lf",&deposit);
               customer[custId].balance += deposit;
               break;
              
           case 4:
               printf( "Bye !!");
               break;
       }
      
       while(getchar() != '\n');               // flush the stream
       printf("\n\nDo you want to continue?(y/n): ");
       scanf( "%c", &ch);
   }while(ch == 'y' || ch == 'Y');
  
return 0;
}