Online Shopping C Program

C program for online shopping.
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Program:-

#include<stdio.h>
#include<string.h>
main()
{
 static int totalCost;
 int i,j,choice,c=1,a[9],cost[9];
 for(i=0;i<9;i++)
 a[i]=0;

 char str[100];
 char items[9][100]={"Sandisk 16 GB",
 "Logitech Mouse",
 "Pendrve 16 GB",
 "Adidas",
 "Nike",
 "Leecooper",
 "Mi Note 3",
 "Nokia 3",
 "Samsung"
 };
 printf("Please Enter Your Name\n");
 gets(str);
 printf("Hello %s, Welcome to our Online Shopping.\n",str);
 do{
  //C is 1 by default
  if(c==1){
  printf("Enter\n1 - Computer Accessories\n2 - Shoes\n3 - Mobiles\nAny other number to exit\n");
  scanf("%d",&choice);
  switch(choice)
  {
   case 1:
   {
    int accessoriesChoice;
    printf("Enter\n1 - Sandisk 16 GB - Rs.355\n2 - Logitech Mouse- Rs.500\n3 - Pendrive 16 GB - Rs.550\nAny other number to exit\n");
    scanf("%d",&accessoriesChoice);
    cost[0]=355;
    cost[1]=500;
    cost[2]=550;
    switch(accessoriesChoice)
    {
     case 1:
     {
      int num;
      printf("You chose Sandisk 16GB with Rs.355.Are you sure to buy.If 'Yes' Enter 1 else any number\n");
      scanf("%d",&num);
      if(num==1)
      {
       a[0]++;
       totalCost+=355;
      }
      printf("Your Cost in Cart is %d\n",totalCost);
      break;
     }
     case 2:
     {
      int num;
      printf("You chose Logitech Mouse with Rs.500.Are you sure to buy.If 'Yes' Enter 1 else any number\n");
      scanf("%d",&num);
      if(num==1)
      {
       a[1]++;
       totalCost+=500;
      }
      printf("Your Cost in Cart is %d\n",totalCost);
      break;
     }
     case 3:
     {
      int num;
      printf("You chose Pendrive 16GB with Rs.550.Are you sure to buy.If 'Yes' Enter 1 else any number\n");
      scanf("%d",&num);
      if(num==1)
      {
       a[2]++;
       totalCost+=550;
      }
      printf("Your Cost in Cart is %d\n",totalCost);
      break;
     }
     default:{
      printf("Exit from Computer Accesories\n");
      break;
     }
    }
    break;
   }
   case 2:
   {
    int shoesChoice;
    printf("Enter\n1 - Adidas - Rs.3550\n2 - Nike - Rs.5000\n3 - Leecooper - Rs.2800\nAny other number to exit\n");
    scanf("%d",&shoesChoice);
    cost[3]=3550;
    cost[4]=5000;
    cost[5]=2800;
    switch(shoesChoice)
    {
     case 1:
     {
      int num;
      printf("You chose Adidas Shoes for Rs.3550.Are you sure to buy.If 'Yes' Enter 1 else any number\n");
      scanf("%d",&num);
      if(num==1)
      {
       a[3]++;
       totalCost+=3550;
      }
      printf("Your Cost in Cart is %d\n",totalCost);
      break;
     }
     case 2:
     {
      int num;
      printf("You chose Nike Shoes for Rs.5000.Are you sure to buy.If 'Yes' Enter 1 else any number\n");
      scanf("%d",&num);
      if(num==1)
      {
       a[4]++;
       totalCost+=5000;
      }
      printf("Your Cost in Cart is %d\n",totalCost);
      break;
     }
     case 3:
     {
      int num;
      printf("You chose Leecooper Shoes for Rs.2800.Are you sure to buy.If 'Yes' Enter 1 else any number\n");
      scanf("%d",&num);
      if(num==1)
      {
       a[5]++;
       totalCost+=2800;
      }
      printf("Your Cost in Cart is %d\n",totalCost);
      break;
     }
     default:{
      printf("Exit from Shoes Category\n");
      break;
     }
    }
    break;
   }
   case 3:
   {
    int mobileChoice;
    printf("Enter\n1 - Mi Note 3 - Rs.11000\n2 - Nokia 3 - Rs.9866\n3 - Samsung - Rs.12800\nAny other number to exit\n");
    scanf("%d",&mobileChoice);
    cost[6]=11000;
    cost[7]=9866;
    cost[8]=12800;
    switch(mobileChoice)
    {
     case 1:
     {
      int num;
      printf("You chose to buy Mi Note 3 for Rs.11000.Are you sure to buy.If 'Yes' Enter 1 else any number\n");
      scanf("%d",&num);
      if(num==1)
      {
       a[6]++;
       totalCost+=11000;
      }
      printf("Your Cost in Cart is %d\n",totalCost);
      break;
     }
     case 2:
     {
      int num;
      printf("You chose to buy Nokia 3 for Rs.9866.Are you sure to buy.If 'Yes' Enter 1 else any number\n");
      scanf("%d",&num);
      if(num==1)
      {
       a[7]++;
       totalCost+=9866;
      }
      printf("Your Cost in Cart is %d\n",totalCost);
      break;
     }
     case 3:
     {
      int num;
      printf("You chose to buy Samsung for Rs.12800.Are you sure to buy.If 'Yes' Enter 1 else any number\n");
      scanf("%d",&num);
      if(num==1)
      {
       a[8]++;
       totalCost+=12800;
      }
      printf("Your Cost in Cart is %d\n",totalCost);
      break;
     }
     default:{
      printf("Exit from Mobile Category\n");
      break;
     }
    }
    break;
   }
   default:
   {
    printf("Enter Valid Categories Choice\n");
    break;
   }
  }
  printf("%s's cart\n",str);
  printf("Id\tItems\t\t\tQuantity\t\t\tCost\n");
  for(i=0;i<9;i++)
  {
   if(a[i]!=0)
   {
    printf("%d\t%s\t\t%d\t\t\t%d\n",i,items[i],a[i],(cost[i]*a[i]));
   }
  }
  printf("Total Cost\t\t\t\t\t%d\n",totalCost);
  printf("If you wish to buy anything more Enter\n1 to Add Item\n2 to Delete Items \nAny other number to Exit\n");
  scanf("%d",&c);
 }
  if(c==2)
  {
   int id;
   printf("Enter id to delete item\n");
   scanf("%d",&id);
   if(id<9&&id>0){
   totalCost=totalCost-(cost[id]*a[id]);
   a[id]=0;
   }
   else{
    printf("Enter Valid id\n");
   }
       printf("Revised Items \n");
       printf("Id\tItems\t\t\tQuantity\t\tCost\n");
            for(i=0;i<9;i++)
      {
     if(a[i]!=0)
      {
    printf("%d\t%s\t\t%d\t\t%d\n",i,items[i],a[i],(cost[i]*a[i]));
      }
     }
        printf("Total Cost\t\t\t\t\t%d\n",totalCost);
        printf("If you wish to buy anything more Enter\n1 to Add Item\n2 to Delete Items \nAny other number to Exit\n");
     scanf("%d",&c);
  }

 }while(c==1 || c==2);
 printf("Your Final Cost is %d\n",totalCost);
 printf("Thanks %s for Choosing Us and Visit us again.\n",str);

}

Output:

Please Enter Your Name
Mahidhar
Hello Mahidhar, Welcome to our Online Shopping.
Enter
1 - Computer Accessories
2 - Shoes
3 - Mobiles
Any other number to exit
2
Enter
1 - Adidas - Rs.3550
2 - Nike - Rs.5000
3 - Leecooper - Rs.2800
Any other number to exit
3
You chose Leecooper Shoes for Rs.2800.Are you sure to buy.If 'Yes' Enter 1 else any number
1
Your Cost in Cart is 2800
Mahidhar's cart
Id      Items                   Quantity                        Cost
5       Leecooper               1                       2800
Total Cost                                      2800
If you wish to buy anything more Enter
1 to Add Item
2 to Delete Items
Any other number to Exit
1
Enter
1 - Computer Accessories
2 - Shoes
3 - Mobiles
Any other number to exit
3
Enter
1 - Mi Note 3 - Rs.11000
2 - Nokia 3 - Rs.9866
3 - Samsung - Rs.12800
Any other number to exit
1
You chose to buy Mi Note 3 for Rs.11000.Are you sure to buy.If 'Yes' Enter 1 else any number
1
Your Cost in Cart is 13800
Mahidhar's cart
Id      Items                   Quantity                        Cost
5       Leecooper               1                       2800
6       Mi Note 3               1                       11000
Total Cost                                      13800
If you wish to buy anything more Enter
1 to Add Item
2 to Delete Items
Any other number to Exit
1
Enter
1 - Computer Accessories
2 - Shoes
3 - Mobiles
Any other number to exit
1
Enter
1 - Sandisk 16 GB - Rs.355
2 - Logitech Mouse- Rs.500
3 - Pendrive 16 GB - Rs.550
Any other number to exit
2
You chose Logitech Mouse with Rs.500.Are you sure to buy.If 'Yes' Enter 1 else any number
1
Your Cost in Cart is 14300
Mahidhar's cart
Id      Items                   Quantity                        Cost
1       Logitech Mouse          1                       500
5       Leecooper               1                       2800
6       Mi Note 3               1                       11000
Total Cost                                      14300
If you wish to buy anything more Enter
1 to Add Item
2 to Delete Items
Any other number to Exit
2
Enter id to delete item
6
Revised Items
Id      Items                   Quantity                Cost
1       Logitech Mouse          1               500
5       Leecooper               1               2800
Total Cost                                      3300
If you wish to buy anything more Enter
1 to Add Item
2 to Delete Items
Any other number to Exit
4
Your Final Cost is 3300
Thanks Mahidhar for Choosing Us and Visit us again.
        

Explanation:
//Coming Soon..