too few arguments

i try to insert paymentMethod() to the code but too few arguments error occured. could u please help me to fix the error? TQ

Code:

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#include<stdio.h>
#include<string.h>
#include<stdlib.h>


double price[7] = {15.80 , 10.50 , 19.00 , 14.00 , 12.00 , 22.00 , 16.00 };
double mealTaxPrices[7];
int adultNumber,childNumber;


void printMeals();
void orderMeals();
double orderForAdult();
double orderForChildren();
void paymentMethod(int);
int main()
{
    char response = 'y';


    printMeals();
    while(response == 'y'|| response == 'Y')
    {
            printf("please enter number of adults  :");
            scanf("%d",&adultNumber);

            printf("please enter number of children:");
            scanf("%d",&childNumber);


            orderMeals();

            printf("\nwould you like to continue(y/n):");
            scanf("\n%c",&response);

            paymentMethod();
    }

 printf("\n      ******************** THANK YOU  *************************\n");
 printf("\**********************  PLEASE COME AGAIN  **************************\ \n");
  system("pause");
  return 0;
}

void printMeals()
{

      printf("\20*******************  WELCOME TO MY RESTAURANT **************************\20\n");
      printf(" \t\t\t Below is the menue:\20\n");
      printf(" \t\t\t MEALS\t\t\tPRICE:\n");
      printf(" \t\t\t \22*******************************\22\n");
      printf(" \t\t\t 1- Fish and Chips\tRM15.80\n");
      printf(" \t\t\t 2- Spaghetti\t\tRM10.50\n");
      printf(" \t\t\t 3- T-Bone Steak\tRM19.00\n");
      printf(" \t\t\t 4- Chicken Chop\tRM14.00\n");
      printf(" \t\t\t 5- Chicken Maryland\tRM12.00\n");
      printf(" \t\t\t 6- Red Lobster\t\tRM22.00\n");
      printf(" \t\t\t 7- Seafood Platter\tRM16.00\n");



      printf("\n");
}
void orderMeals()
{
        double totalPriceForAdult, totalPriceForChildren;
        double allPayment,discount;
        printf("                      \t\t**** ORDER MENU****\n");


        totalPriceForAdult =  orderForAdult();
        totalPriceForChildren = orderForChildren();
                allPayment = totalPriceForAdult + totalPriceForChildren ;

    printf("\n \t\t    \22**************************************\22    \n");
    printf(" \t\t  ******************  TOTAL BILL  ************      \n");
    printf(" \t\t\tadult/child\tcount\t\ttotal price\n");
    printf(" \t\t\tadults\t\t%d\t\t%5.2f\n",adultNumber,totalPriceForAdult);
    printf(" \t\t\tchildren\t%d\t\t%5.2f\n",childNumber,totalPriceForChildren);
    printf(" \t\t\tTotal bill\t\t\t%5.2f\n",allPayment );



    if(allPayment < 10)
                discount=((allPayment * 0.5)/100);
    else if(allPayment>= 10 && allPayment<20)
          discount=((allPayment * 1)/100);
    else if(allPayment>= 20 && allPayment<30)
          discount=((allPayment * 1.5)/100);
    else if(allPayment>= 30 && allPayment<40)
          discount=((allPayment * 2.0)/100);
        else
                  discount= ((allPayment * 5.0)/100);

          printf(" \t\t\tTotal bill after discount\t%5.2f\n",allPayment-discount);

}
double orderForAdult()
{
    int menuOption,i,amount;
      char response = 'y';
      double totalPerPerson = 0.0,totalAllPerson = 0.0;
      double tax = 5.0;
      if(adultNumber <=0)
                  printf("\n ");
          else
      printf("*\tadults:\n");
      for(i=0;i<adultNumber;i++)
    {
              printf("adult %d please enter your orders\n",i+1);
              while(response == 'y' || response == 'Y')
              {
                              printf("please enter your option:");
                              scanf("%d",&menuOption);
                                                          if(menuOption<1 || menuOption>7)
                                                          {
                                                                  printf("sorry we don`t have this order \nagain! ");
                                                                  continue;
                                                          }
                              printf("please enter your amount of order:");
                              scanf("%d",&amount);


                          totalPerPerson = totalPerPerson + (amount * price[menuOption - 1] );

                              printf("\nWould you like to enter more orders(y/n):");
                              scanf("\n%c",&response);



              }
              printf("\n");
              totalAllPerson += totalAllPerson +  totalPerPerson;
              totalPerPerson = 0.0;
              response = 'y';
    }

    return totalAllPerson + ((totalAllPerson * tax) / 100);
}
double orderForChildren()
{
      int menuOption,i,amount;
      char response = 'y';
      double totalPerChild = 0.0,totalAllChildren = 0.0;
      double tax = 5.0,oneOrder;
      if(childNumber <=0)
                  printf("\n");
          else
      printf("*\tChildren:\n");
      for(i=0;i<childNumber;i++)
    {
              printf("child %d please enter your orders\n",i+1);
              while(response == 'y' || response == 'Y')
              {
                              printf("please enter your option:");
                              scanf("%d",&menuOption);
                                                          if(menuOption<1 || menuOption>7)
                                                          {
                                                                  printf("sorry we don`t have this order \nagain! ");
                                  continue;
                                                          }
                              printf("please enter your amount of order:");
                              scanf("%d",&amount);

                              oneOrder = (price[menuOption - 1] * 60)/100 ;//this one order for a child with discount %60 of one order of adult
                              totalPerChild = totalPerChild + (amount * oneOrder)  ;

                                                          printf("Would you like to enter more orders(y/n):");
                              scanf("\n%c",&response);


              }
              totalAllChildren += totalAllChildren +  totalPerChild;
              response = 'y';
              totalPerChild = 0.0;

              printf("\n");

    }

    return totalAllChildren + ((totalAllChildren * tax) / 100);

void paymentMethod()
{
    int choice;

  start :
  printf("--------------------------------------------------------------------\n");
  printf("Select Payment Method:\n");
  printf("1) Cash\n");
  printf("2) Online Wallet\n");
  printf("3) Online Transaction\n");
  printf("5) Quit\n");
  printf("--------------------------------------------------------------------\n");

  do {
    scanf("%d", &choice);
    if (choice < 1 || choice > 5)
      printf("Invalid input.Try again \n");
  } while(choice < 1 || choice > 5);
}
}
//}

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Quote:

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Originally Posted by mars88

i try to insert paymentMethod() to the code but too few arguments error occured. could u please help me to fix the error?

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Let's take a look at your forward declaration of paymentMethod:

Code:

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void paymentMethod(int);

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So, paymentMethod is a function that has an int parameter and void return type. You neglected the parameter name, but that is legal in a forward declaration, though I would recommend including the parameter name anyway.

Now, let's take a look at how you call it:

Code:

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paymentMethod();

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You call paymentMethod as if it is a function that has no parameters. Clearly, there is a mismatch here. Finally, let's take a look at the start of your definition of paymentMethod:

Code:

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void paymentMethod()
{

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So, this matches how you call paymentMethod. Perhaps you should change the forward declaration of paymentMethod...

Except that I note that a function that has no parameters and void return type can only have a net effect by side effects, or by changing global variables. From what I see, paymentMethod is intended to request the payment method from the user, which means that it must have some way to set that payment method such that the caller can access it. Now, you are indeed using global variables, but you should stop that immediately: your variables should only be local to a function, passed around as needed. Therefore, you probably also need to change paymentMethod to have a non-void return type, or possibly a pointer parameter.