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Program 258: Online Shopping Program using C

Program 258: Online Shopping Program using C
#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);
 
}

Online Shopping including Change in Quantity
#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\tQuantity\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\n3 to Change Quantity \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\tQuantity\tCost\n");
            for(i=0;i<9;i++)
      {
     if(a[i]!=0)
      {
    printf("%d\t%s\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\n3 to Change Quantity \nAny other number to Exit\n");
     scanf("%d",&c);
  }
  if(c==3)
  {
   int id,quantity;
   printf("Enter id to Change quantity of an item\n");
   scanf("%d",&id);
   printf("Enter quantity to be changed of an item\n");
   scanf("%d",&quantity);
   if(id<9&&id>0){
    if(quantity>0 && a[id]>0){  
        if(quantity<a[id]) 
     {
      int dec=a[id]-quantity;
      a[id]=quantity;
       totalCost=totalCost-(cost[id]*dec); 
     }
     if(quantity>a[id]) 
     {
      int inc=quantity-a[id];
      a[id]=quantity;
       totalCost=totalCost+(cost[id]*inc); 
     }
     if(quantity==a[id]) 
     {
      a[id]=quantity;
       totalCost=totalCost+0; 
     }   
           
    }
    else{
       printf("Item has no Quantity.Please Try again\n");
    }
     }
     else{
    printf("Enter Valid id\n");
   }
       printf("Revised Items \n");
       printf("Id\tItems\t\tQuantity\tCost\n");
            for(i=0;i<9;i++)
      {
     if(a[i]!=0)
      {
    printf("%d\t%s\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\n3 to Change Quantity \nAny other number to Exit\n");
     scanf("%d",&c);
  }
 }while(c==1 || c==2 ||c==3);
 printf("Your Final Cost is %d\n",totalCost);
 printf("Thanks %s for Choosing Us and Visit us again.\n",str);
 
}



Explanation:

//Coming Soon
Output:
Online Shopping Program using C

Online Shopping Program using C

Online Shopping Program using C

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