Pointer to union inside struct

Hi,

I have the following program:

Code:

---

#include <stdio.h>

typedef struct 
{
        int id; 
        union
        {
                struct
                {                 
                        int major;       
                        int minor;
                } version;
        } data;
} cli_struct;

int main(void);
int add(cli_struct *cli);

int main(void)
{
        int result;
        cli_struct cli;

        cli.id = 5;
        cli.data.version.minor = 15;
        result = add(&cli);
        printf("Add: %d\n", result);
        return(0);
}

int add(cli_struct *cli)
{
        int result;

        result = cli->id + cli->data->version->minor;
        return(result);
}

---

When I compile with gcc I got de following message:

error: invalid type argument of `->'

How can I access the member "minor" inside the function "add"?
Thanks in advance for any answer.
Best regards,

Luis Vital

1) Your use of union is pretty pointless in this example if you ask me, but that's not a mistake per say.

2) version is not a pointer.

Try

Code:

---

result = cli->id + cli->data->version.minor;

---

result = cli->id + cli->data.version.minor;

To clarify, only 'cli' is the pointer, so only the first depth uses ->. None of your other accesses are via pointer, so you use the dot operator.


Quzah.