Visual C++ 6.0

• Ito_^

  19 Feb 06, 15:59

  I'm doing some simple C standard coding on it.. but it gives me an "warning C4013: 'function1' undefined; assuming extern returning int". i think its compiler problem becuz it shouldn't give me any syntax error in the first place.
  
  anyone knows why?
• ndmmxiaomayi

  19 Feb 06, 16:08

  Paiseh....
  
  Cannot help. I don't know C++
• Ito_^

  19 Feb 06, 16:10

  Originally posted by ndmmxiaomayi:

  Paiseh....
  
  Cannot help. I don't know C++

  its not c++ its c.
• Ole

  19 Feb 06, 16:23

  care posting the offending code?
  
• bohiruci

  19 Feb 06, 16:46

  Originally posted by Ito_^:

  I'm doing some simple C standard coding on it.. but it gives me an "warning C4013: 'function1' undefined; assuming extern returning int". i think its compiler problem becuz it shouldn't give me any syntax error in the first place.
  
  anyone knows why?

  you show the whole code here , i understand C as i used it in poly
  
  i will probably know where u gone wrong
  
  
• SnowFlag

  19 Feb 06, 16:49

  I dun think it is the compiler problem
• Ito_^

  19 Feb 06, 16:56

  very very simple one.
  
  

  code:

  
  /*
  ver 0.1
  
  Allows user to key in multiple DVDs.
  Allows user to enter his particular.
  Displays all the DVDs on screen.
  Allows user to choose three DVD code.
  
  To Do:
  - Use struct to store multiple user information.
  - Data and format validation.
  */
  
  #include 
  #include 
  #include 
  
  void main()
  {
  // Menu Variables
  int choice, showMenu = 1;
  // DVD Variables
  int DVD_Code_DVD[999];
  char DVD_Title[999][100], YearOfRelease[999][100];
  float Price[999];
  // Rental Variables
  int Customer_ID, DVD_Code_Rental, Rental_Counter;
  char Customer_Name[100], DateOfRental[100], VIP[100];
  
  //Other Variables
  int breakCheck = 0;
  int i = 0;
  
  // Display Menu
  do{
  system("cls");
  printf("\n\n    ONLINE DVD RENTAL SYSTEM \n");
  printf("\n\n(1) INPUT OF BOOKING:");
  printf("\n\n(2) INPUT RENTALS INFORMATION:");
  printf("\n\n(3) Display Rentals Summary :");
  printf("\n\n(4) Display Statistics");
  printf("\n\n(5) SYSTEM EXIT?");
  printf("\n\n >> ENTER YOUR CHOICE:");
  choice = getchar();
  
  switch(choice) {
  case '1':
  function1();
  //input of DVDs
  for(i=0; i<1; i++) {
  puts("Enter the following information. \n\n\n");
  puts("DVD Code: ");
  scanf("%s", &DVD_Code_DVD[i]);
  puts("\nDVD Title: ");
  scanf("%s", &DVD_Title[i]);
  puts("\nYear Of Release");
  scanf("%s", &YearOfRelease[i]);
  puts("\nPrice: ");
  scanf("%s", &Price[i]);
  }
  //end
  break;
  case '2':
  //Input of Rentals
  for(i=0; i<1; i++) {
  puts("Enter the following information. \n\n\n");
  puts("Customer ID: ");
  scanf("%s", &Customer_ID);
  puts("\nCustomer Name: ");
  scanf("%s", &Customer_Name);
  puts("\nDVD Code");
  scanf("%s", &DVD_Code_Rental);
  puts("\nVIP: ");
  scanf("%s", &VIP[i]);
  puts("\nDate of Rental: ");
  scanf("%s", &DateOfRental);
  puts("\nRental Counter: ");
  scanf("%s", &Rental_Counter);
  }
  //end
  
  puts("\n\n");
  _sleep(2000);
  system("pause");
  puts("\n");
  
  //Display All DVDs
  for(i=0; i<1; i++) {
  printf("\n\nDVD Information\n");
  printf("DVD Code: %s\n", &DVD_Code_DVD[i]);
  printf("DVD Title: %s\n", &DVD_Title[i]);
  printf("Year of Release: %s\n", &YearOfRelease[i]);
  printf("Price: %s\n", &Price[i]);
  }
  //end
  
  //Allow User to Choose One.
  for(i=0; i<1; i++) {
  printf("\nEnter DVD Code: ");
  scanf("%s", &DVD_Code_Rental);
  }
  //end
  break;
  case '3':
  puts("function 3");
  break;
  case '4':
  puts("function 4");
  break;
  case '5':
  puts("function 5");
  showMenu = 0;
  break;
  default:
  puts("\n\nPlease try again.\n\n");
  }
  }while(showMenu == 1);
  
  printf("\n\nTHANK YOU!  GOOD DAY!\n\n");
  }
  
  void function1() {
  puts("\ntest1\n");
  }
  

  
  
  other funny thing is dat i cannot use %d to do i/o on screen. =.=""
• Twincat

  19 Feb 06, 17:29

  Originally posted by Ito_^:
  very very simple one.
  
  

  code:

  
  /*
  ver 0.1
  
  Allows user to key in multiple DVDs.
  
  Allows user to enter his particular.
  Displays all the DVDs on screen.
  Allows user to choose three DVD code.
  
  To Do:
  - Use struct to store multiple user information.
  - Data and format validation.
  */
  
  #include 
  #include 
  #include 
  
  void function1(void); // Insert here 
  
  void main()
  {
  // Menu Variables
  int choice, showMenu = 1;
  // DVD Variables
  int DVD_Code_DVD[999];
  char DVD_Title[999][100], YearOfRelease[999][100];
  float Price[999];
  // Rental Variables
  int Customer_ID, DVD_Code_Rental, Rental_Counter;
  char Customer_Name[100], DateOfRental[100], VIP[100];
  
  //Other Variables
  int breakCheck = 0;
  int i = 0;
  
  // Display Menu
  do{
  system("cls");
  printf("\n\n    ONLINE DVD RENTAL SYSTEM \n");
  printf("\n\n(1) INPUT OF BOOKING:");
  printf("\n\n(2) INPUT RENTALS INFORMATION:");
  printf("\n\n(3) Display Rentals Summary :");
  printf("\n\n(4) Display Statistics");
  printf("\n\n(5) SYSTEM EXIT?");
  printf("\n\n >> ENTER YOUR CHOICE:");
  choice = getchar();
  
  switch(choice) {
  case '1':
  [b]function1();
  //input of DVDs
  for(i=0; i<1; i++) {
  puts("Enter the following information. \n\n\n");
  puts("DVD Code: ");
  scanf("%s", &DVD_Code_DVD[i]);
  puts("\nDVD Title: ");
  scanf("%s", &DVD_Title[i]);
  puts("\nYear Of Release");
  scanf("%s", &YearOfRelease[i]);
  puts("\nPrice: ");
  scanf("%s", &Price[i]);
  }
  //end
  break;
  case '2':
  //Input of Rentals
  for(i=0; i<1; i++) {
  puts("Enter the following information. \n\n\n");
  puts("Customer ID: ");
  scanf("%s", &Customer_ID);
  puts("\nCustomer Name: ");
  scanf("%s", &Customer_Name);
  puts("\nDVD Code");
  scanf("%s", &DVD_Code_Rental);
  puts("\nVIP: ");
  scanf("%s", &VIP[i]);
  puts("\nDate of Rental: ");
  scanf("%s", &DateOfRental);
  puts("\nRental Counter: ");
  scanf("%s", &Rental_Counter);
  }
  //end
  
  puts("\n\n");
  _sleep(2000);
  system("pause");
  puts("\n");
  
  //Display All DVDs
  for(i=0; i<1; i++) {
  printf("\n\nDVD Information\n");
  printf("DVD Code: %s\n", &DVD_Code_DVD[i]);
  printf("DVD Title: %s\n", &DVD_Title[i]);
  printf("Year of Release: %s\n", &YearOfRelease[i]);
  printf("Price: %s\n", &Price[i]);
  }
  //end
  
  //Allow User to Choose One.
  for(i=0; i<1; i++) {
  printf("\nEnter DVD Code: ");
  scanf("%s", &DVD_Code_Rental);
  }
  //end
  break;
  case '3':
  puts("function 3");
  break;
  case '4':
  puts("function 4");
  break;
  case '5':
  puts("function 5");
  showMenu = 0;
  break;
  default:
  puts("\n\nPlease try again.\n\n");
  }
  }while(showMenu == 1);
  
  printf("\n\nTHANK YOU!  GOOD DAY!\n\n");
  }
  
  void function1() {
  puts("\ntest1\n");
  }
  

  
  
  other funny thing is dat i cannot use %d to do i/o on screen. =.=""[/b]

  You got to pre-declare (see above code in red) that procedure before main() if you intend to write the actual procedure after main(). The compiler compiles the codes top to bottom, so there is no way it can know wat function1 does when it can't find in the declarations before reaching that line calling for it.
• Ito_^

  19 Feb 06, 17:41

  Originally posted by Twincat:

  You got to pre-declare (see above code in red) that procedure before main() if you intend to write the actual procedure after main(). The compiler compiles the codes top to bottom, so there is no way it can know wat function1 does when it can't find in the declarations before reaching that line calling for it.

  diao! ok i go try.