Re: Convert to structure

chekers · #11 16-Oct-2009, 10:31

CPP / C++ / C Code:

#include <stdio.h>

int main()
{
  printf("Hello World");
  getchar();
  return 0;
}

its work in the compiler...showin output Hello world....

fakepoo · #12 16-Oct-2009, 10:41

Ok, let's add the structure definition to it:

CPP / C++ / C Code:

#include <stdio.h>

struct Course
{
  int CreditHours; // 2, 3, or 4
  int Mark; // 0 to 100
};

int main()
{
  printf("Hello World");
  getchar();
  return 0;
}

Now, try to compile again.

chekers · #13 16-Oct-2009, 10:44

can execute without any error,,,show the output Hello World....

fakepoo · #14 16-Oct-2009, 10:59

Now, let's add the Student struct

CPP / C++ / C Code:

#include <stdio.h>

struct Course
{
  int CreditHours; // 2, 3, or 4
  int Mark; // 0 to 100
};

struct Student
{
  char Name[32]; // Up to 31 characters long
  Course Courses[3]; // An array of 3 courses
};

int main()
{
  printf("Hello World");
  getchar();
  return 0;
}

My best guess is that this will give you the error. If so, change it to:

CPP / C++ / C Code:

struct Student
{
  char Name[32]; // Up to 31 characters long
  struct Course Courses[3]; // An array of 3 courses
};

chekers · #15 16-Oct-2009, 11:12

its executable if use

CPP / C++ / C Code:

struct Student
{
  char Name[32]; // Up to 31 characters long
  struct Course Courses[3]; // An array of 3 courses
};

and the output is Hello World

Howard_L · #16 16-Oct-2009, 19:01

Well keep on adding stuff like that until it breaks!
Then fix it.
If you have trouble fixing it post back with the code and error.

chekers · #17 16-Oct-2009, 21:58

CPP / C++ / C Code:

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

struct Course
{
  int CreditHours; 
  int Mark; 
};

struct Student
{
  char Name[32];
  struct Course Courses[3]; 
};

{
 void PrintName(Student*student)
}
{
  int AddMarks(Student *student);

  int sum = 0;
  for(int i=0;i<3;++i) sum += student->Courses[i].Mark;
  return sum;
}

  int main()
{
  
  struct Student s ;
  strcpy(s.Name, "chekers");
  
  s.Courses[0].CreditHours = 3;
  s.Courses[0].Mark = 68;

  s.Courses[1].CreditHours = 2;
  s.Courses[1].Mark = 55;

  s.Courses[2].CreditHours = 4;
  s.Courses[2].Mark = 81;

  printf("Sum of Marks = %d",AddMarks(&s));
  getchar();
  return 0;
}

the errors shown here is

Code:

Compiling...
m.c
C:\Users\Viper\Desktop\m.c(16) : error C2449: found '{' at file scope (missing function header?)
C:\Users\Viper\Desktop\m.c(18) : error C2059: syntax error : '}'
C:\Users\Viper\Desktop\m.c(42) : warning C4013: 'AddMarks' undefined; assuming extern returning int
Error executing cl.exe.

m.exe - 2 error(s), 1 warning(s)

Howard_L · #18 16-Oct-2009, 22:48

No, you added a whole bunch of wrong stuff.
BUILD your program ONE piece at a time.

1- Go back to where you had a good compile above.

2- add ONE statement.
3- compile and run.
Repeat 2 and 3 until you get the first problem and post us then.

chekers · #19 17-Oct-2009, 10:49

ok...let start one by one...now i added 2 statement there....and shows 2 error.

CPP / C++ / C Code:

#include <stdio.h>

struct Course
{
  int CreditHours; // 2, 3, or 4
  int Mark; // 0 to 100
};

struct Student
{
  char Name[32]; // Up to 31 characters long
  struct Course Courses[3]; // An array of 3 courses
};
{
 void PrintName(Student*student)
}
{
  int AddMarks(Student *student);

  int sum = 0;
  for(int i=0;i<3;++i) sum += student->Courses[i].Mark;
  return sum;
}
int main()
{
  printf("Hello World");
  getchar();
  return 0;
}

Before add this statement ,there is no error...

CPP / C++ / C Code:

{
 void PrintName(Student*student)
}
{
  int AddMarks(Student *student);

  int sum = 0;
  for(int i=0;i<3;++i) sum += student->Courses[i].Mark;
  return sum;
}

After add the above one...its show 2 error that is

Compiling...
g.c
C:\Users\Viper\Desktop\g.c(14) : error C2449: found '{' at file scope (missing function header?)
C:\Users\Viper\Desktop\g.c(16) : error C2059: syntax error : '}'
Error executing cl.exe.

g.exe - 2 error(s), 0 warning(s)

Howard_L · #20 17-Oct-2009, 14:29

Well in those two items there are several mistakes and there are some other things you should change as well.
Let's start with this...

CPP / C++ / C Code:

/* In strict C syntax 
   -this is the ONLY legal comment form. // is for C++ and others
    I know of no legal one liner for C
   -you should not declare a variable within code: */

for(int i=0;i<3;++i) sum += student->Courses[i].Mark;

/* They should always be declared at the beginning of a code block: */

int main(void)
{
  int i;
  for(i= 0; i < 3; ++i) sum += student->Courses[i].Mark;
  ...

/* also , There is no need to cram you code. Use spaces - they're cheap!
   It will be much easier to read  */

/* A function has this form: */

return_type  function_name( input_arguments )
{
    stuff_to_be_done;
}

/* And NOT this: */     

{
 void PrintName(Student*student)
}

/* fix the curly braces */

/* This semicolon ends the function right there... */

int AddMarks( Student *student);

/*  ... therefore the function does nothing!       */

/* Now this is kinda tricky but hang in there with it... 
   In your function definition you are trying to declara a pointer: */      

void PrintName( Student * student)
{ stuff(); }

/* A function argument needs to have the datatype stated.  
   So , even though it is declared in the header area "Student" is NOT a 
   data "type" , it is a "data template identifier (name)" for the struct you designed.
   So you will need to state the data type of "Student".
   (Hint like you have for the "s" object in the main() of your previous code posting)
   
   You could also create a data type for the structure using a "typedef" but 
   that's kind of a separate issue. Just use the struct as you are for now, it 
   will help you to get the handle on pointers which is key.
*/

Let's see how you do now.

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