help changing this to function oriented prog and add array to it

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hellow guys im not asking too much but i dont have any idea how to add an array in this and change the printf to function oriented if you all can give me some good examples on both array and function oriented with close to my ordering system i would really appreciate it thanks.

C++

 #include<stdio.h>
 #include<conio.h>

void main()
{
int code;
float price;
float totalf;
float payment;
float change;
int qty;
float mul;
int exceed;
float sub;
float subt;
int can;
int qty1;
int cel;
int yn;

totalf = 0;
qty1 = 0;

printf("\n\n\n\n\n");
printf("Code			Item				Price");
printf("\n");
printf("\n 1			Burger				10.50");
printf("\n");
printf("\n 2			Footlong			36.75");
printf("\n");
printf("\n 3			Shawarma			62.80");
printf("\n");
printf("\n 4			Fries				25.60");
printf("\n");
printf("\n 5			Juice				10.00");
printf("\n");
printf("\n 6			Shake				15.00");
printf("\n");
printf("\n Press . to exit after you order or just want to exit");


do
{
printf("\n\n");
printf("\nEnter Code: ");
scanf("%i", &code);
printf("Quantity: ");
scanf("%i", &qty);

qty1 = qty1+qty;
if(qty1<= 20)
{
switch(code)
{
case 1:
	printf("Current Item Order: ");
	printf("%i", qty);
   printf(" Burger");
   printf("\nPrice per Item: 10.50");
  price = 10.50;
  mul = qty * price;
  totalf = totalf + mul;
  printf("\nCurrent Item price: ");
  printf("%.2f", mul);
  printf("\nCurrent Order Total: ");
  printf("%.2f", totalf);
  break;

case 2:
	printf("Current Item Order: ");
	printf("%i", qty);
   printf(" Footlong");
   printf("\nPrice per Item: 36.75");
	price = 36.75;
   mul = qty * price;
   printf("\nCurrent Item price: ");
  printf("%.2f", mul);
  totalf = totalf + mul;
  printf("\nCurrent Order Total: ");
  printf("%.2f", totalf);
  break;

case 3:
	printf("Current Item Order: ");
	printf("%i", qty);
   printf(" Shawarma");
   printf("\nPrice per Item: 62.80");
	price = 62.80;
   mul = qty * price;
   printf("\nCurrent Item price: ");
  printf("%.2f", mul);
  totalf = totalf + mul;
  printf("\nCurrent Order Total: ");
  printf("%.2f", totalf);
  break;

case 4:
	printf("Current Item Order: ");
	printf("%i", qty);
   printf(" Fries");
   printf("\nPrice per Item: 25.60");
	price = 25.60;
   mul = qty * price;
   printf("\nCurrent Item price: ");
  printf("%.2f", mul);
  totalf = totalf + mul;
  printf("\nCurrent Order Total: ");
  printf("%.2f", totalf);
  break;

case 5:
	printf("Current Item Order: ");
	printf("%i", qty);
   printf(" Juice");
   printf("\nPrice per Item: 10.00");
	price = 10.00;
   mul = qty * price;
   printf("\nCurrent Item price: ");
  printf("%.2f", mul);
  totalf = totalf + mul;
  printf("\nCurrent Order Total: ");
  printf("%.2f", totalf);
  break;

case 6:
printf("Current Item Order: ");
	printf("%i", qty);
   printf(" Shake");
   printf("\nPrice per Item: 15.00");
	price = 15.00;
   mul = qty * price;
   printf("\nCurrent Item price: ");
  printf("%.2f", mul);
  totalf = totalf + mul;
  printf("\nCurrent Order Total: ");
  printf("%.2f", totalf);
  break;

default:
printf("Invalid Input!");

}
}
else
{
switch(code)
{
case 1:
	printf("Current Item Order: ");
	printf("%i", qty);
   printf(" Burger");
   printf("\nPrice per Item: 10.50");
  price = 10.50;
  mul = qty * price;
  totalf = totalf + mul;
  printf("\nCurrent Item price: ");
  printf("%.2f", mul);
  printf("\nCurrent Order Total: ");
  printf("%.2f", totalf);
  break;

case 2:
	printf("Current Item Order: ");
	printf("%i", qty);
   printf(" Footlong");
   printf("\nPrice per Item: 36.75");
	price = 36.75;
   mul = qty * price;
   printf("\nCurrent Item price: ");
  printf("%.2f", mul);
  totalf = totalf + mul;
  printf("\nCurrent Order Total: ");
  printf("%.2f", totalf);
  break;

case 3:
	printf("Current Item Order: ");
	printf("%i", qty);
   printf(" Shawarma");
   printf("\nPrice per Item: 62.80");
	price = 62.80;
   mul = qty * price;
   printf("\nCurrent Item price: ");
  printf("%.2f", mul);
  totalf = totalf + mul;
  printf("\nCurrent Order Total: ");
  printf("%.2f", totalf);
  break;

case 4:
	printf("Current Item Order: ");
	printf("%i", qty);
   printf(" Fries");
   printf("\nPrice per Item: 25.60");
	price = 25.60;
   mul = qty * price;
   printf("\nCurrent Item price: ");
  printf("%.2f", mul);
  totalf = totalf + mul;
  printf("\nCurrent Order Total: ");
  printf("%.2f", totalf);
  break;

case 5:
	printf("Current Item Order: ");
	printf("%i", qty);
   printf(" Juice");
   printf("\nPrice per Item: 10.00");
	price = 10.00;
   mul = qty * price;
   printf("\nCurrent Item price: ");
  printf("%.2f", mul);
  totalf = totalf + mul;
  printf("\nCurrent Order Total: ");
  printf("%.2f", totalf);
  break;

case 6:
printf("Current Item Order: ");
	printf("%i", qty);
   printf(" Shake");
   printf("\nPrice per Item: 15.00");
	price = 15.00;
   mul = qty * price;
   printf("\nCurrent Item price: ");
  printf("%.2f", mul);
  totalf = totalf + mul;
  printf("\nCurrent Order Total: ");
  printf("%.2f", totalf);
  break;
default:
printf("Invalid Input!");
}
printf("\nExceeded Maximum Order");
}
}while(totalf < 1500.00 && qty1 < 20 );

if(totalf == 1500.00)
{
printf("\n\n");
printf("\nThis is the maximum amount to be ordered!");
}
if(qty1 == 20 || totalf == 1500.00)
{
printf("\n");
printf("\nThis will be your last order!");
}

if (totalf > 1500.00 || qty1 > 20)
{
printf("\n\n");
printf("\nYour Order Exceeded the Maximum Amount Allowed");
printf("\nPress 0 to cancel your order or Press 9 to deduct your order: ");
scanf("%i", &exceed);

switch(exceed)
{
case 9:
qty1;
do
{
printf("\nHow Much Amount  will be cancelled? ");
printf("\nEnter Order Item Code to subtract: ");
scanf("%i", &cel);
switch(cel)
{
case 1:
price = 10.50;
printf("\nHow many burger to remove: ");
scanf("%i", &qty);
sub = price * qty;
break;

case 2:
price = 36.75;
printf("\nHow many footlong to remove: ");
scanf("%i", &qty);
sub = price * qty;
break;

case 3:
price = 62.80;
printf("\nHow many shawarma to remove: ");
scanf("%i", &qty);
sub = price * qty;
break;

case 4:
price = 25.60;
printf("\nHow many fries to remove: ");
scanf("%i", &qty);
sub = price * qty;
break;

case 5:
price = 10.00;
printf("\nHow many juice to remove: ");
scanf("%i", &qty);
sub = price * qty;
break;

case 6:
price = 15.00;
printf("\nHow many burger to remove: ");
scanf("%i", &qty);
sub = price * qty;
break;
}
subt = totalf - sub;
totalf = subt;
qty1 = qty1 - qty;
}while(totalf > 1500.00 || qty1 > 20);
break;

case 0:
can = 1;
break;
}
}
else
{
totalf;                                             
}

if(can == 1)
{
printf("\nOrder Cancelled!");
}

else
{
printf("\n");
printf("\nYour Total Order is: ");
printf("%.2f", totalf);

do
{
printf("\n");
printf("\nCustomer's Money: ");
scanf("%f", &payment);

if(payment < totalf)
{
printf("\nSorry you don't have sufficient cash!");
printf("\nDo you want to cancel your order? Press 1 to pay or press 0 to cancel: ");
scanf("%i", &yn);
}
else
{
change = payment - totalf;
printf("\nYour Change is: ");
printf("%.2f", change);
printf("\n\n THANK YOU!");
}
}while(payment<totalf yn="=" mode="hold" />}
printf("\n Canceled Order!");
getch();
}

Posted 25-Nov-15 0:39am

DarkMoneyX

Updated 25-Nov-15 0:49am

CPallini

v2

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CPallini · Answer 1 · 2015-11-25T01:05:00

Solution 1

I give you a simple example:

C++

#include <stdio.h>

typedef struct _Item
{
  const char * desc;
  float price;
} Item;


void show_menu(Item it[], int items)
{
  int n;
  printf("%-20s %s\n", "Item", "Price");
  for (n=0; n<items; ++n)
  {
    printf("%-20s %5.2f\n", it[n].desc, it[n].price);
  }
}


int main()
{
  Item item[] = { { "Burger", 10.5}, {"FootLong", 36.75 } /* more items here */ };

  const int ITEMS = sizeof(item)/sizeof(item[0]);

  show_menu(item, ITEMS);
  return 0;
}

Posted 25-Nov-15 1:05am

CPallini

Comments

DarkMoneyX 25-Nov-15 8:34am

thanks

CPallini 25-Nov-15 8:45am

You are welcome.

DarkMoneyX 25-Nov-15 8:59am

so this one you gave me also has array ? in it

George Jonsson 25-Nov-15 17:32pm

Maybe, just maybe is this an array:
Item item[] = { { "Burger", 10.5}, {"FootLong", 36.75 }
;-)