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Having trouble trying to use a global structure
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After fixing some pointer problems with my structures, I decided to move the functions performed on them to another .cpp file.
Here's the definition in my main.cpp above the int main() of course
then in my tables.cpp file I try to initialize these structures
I don't think this is a linking problem, because if I comment out the three printf() statements show_employee_data() the rest of the show_employee_data() runs and displays on the screen(not shown in my code above).
By the way in main.cpp I'm currently just assigning constants to the structures just to try and make the show function work.
Here's the definition in my main.cpp above the int main() of course
struct employee { char name[20]; int schedule; int level; }; struct employee salesdept[10];
then in my tables.cpp file I try to initialize these structures
extern struct employee salesdept[10]; // forward declaration of `struct characters' int show_employee_data(void) { struct employee *ptr_sales; ptr_sales=&salesdept[0]; for(int i=0; i<10; i++) { printf("Employee: %s\n",ptr_sales->name); // invalid use of undefined type `struct characters' printf("Shift: %d\n",ptr->schedule); // invalid use of undefined type `struct characters' printf("Level: %d\n\n\n",ptr->level); // invalid use of undefined type `struct characters' } // more unrelated code follows, mostly text displaying }
I don't think this is a linking problem, because if I comment out the three printf() statements show_employee_data() the rest of the show_employee_data() runs and displays on the screen(not shown in my code above).
By the way in main.cpp I'm currently just assigning constants to the structures just to try and make the show function work.
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Join Date: Dec 2004
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Posting Pro in Training
umm correct me if im wrong but in main as no reference to the other cpp file? should you not want to include it?
this may work / may not, baring in mind I've not played with structs much I prefare class's much easier!!
this may work / may not, baring in mind I've not played with structs much I prefare class's much easier!!
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I tried using #include"tables.cpp" and got the same errors. I'm using a project manager that links them, so I'm not sure if I need to place it there, but I'll leave it there just in case.
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Join Date: Dec 2004
Posts: 489
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Solved Threads: 5
Posting Pro in Training
Why dont you put everything in 1 .cpp file and see if it makes a differece? If so then you are missing a few includes of files???
Just a random thought!
Just a random thought!
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Join Date: Apr 2004
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For starters, I'd recommend putting the following into a header, say "tables.h". Then in "tables.cpp" have this. And then change "main.cpp" to this.
struct employee
{
char name[20];
int schedule;
int level;
};
extern struct employee salesdept[10];#include "tables.h"
int show_employee_data(void)
{
struct employee *ptr_sales;
ptr_sales=&salesdept[0];
for(int i=0; i<10; i++)
{
printf("Employee: %s\n",ptr_sales->name);
printf("Shift: %d\n",ptr->schedule);
printf("Level: %d\n\n\n",ptr->level);
}
// ...
}#include "tables.h"
struct employee salesdept[10]; "One of the methods used by statists to destroy capitalism consists in establishing controls that tie a given industry hand and foot, making it unable to solve its problems, then declaring that freedom has failed and stronger controls are necessary." --Ayn Rand
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