initializing an array of struct in C doesn't work as expected

Question

Why would this not work:

#define PORT_ID_MAX_CHAR                6

typedef struct  {
    int phys;
    char name[PORT_ID_MAX_CHAR];
}tPortMap;

struct tPortMap c_portMap[] = { 0, "test" }, { 1,"test" };

GCC barks at me saying myfile.c:8:46: error: expected identifier or ‘(’ before ‘{’ token struct tPortMap c_portMap[] = { 0, "test" }, { 1,"test" }; and I don't know why... I'm puzzled...

EDIT1

With extra braces I get the error: struct tPortMap c_portMap[] = {{ 0, "test" }, { 1,"test" }};

myfile.c:8:17: error: array type has incomplete element type struct tPortMap c_portMap[] = {{ 0, "test" }, { 1,"test" }};

does struct tPortMap c_portMap[] = {{ 0, "test" }, { 1,"test" }}; solve the problem? — Serge
– Serge, Commented Mar 14, 2016 at 18:33

R Sahu · Accepted Answer · 2016-03-14 18:41:10Z

2

You need another pair of braces that surround the data for the elements of the array.

Also, you don't need to use struct tPortMap since you have already typedefed tPortMap.

tPortMap c_portMap[] = { { 0, "test" }, { 1,"test" } };
                       ^^                            ^^

When you use

struct tPortMap c_portMap[] = { { 0, "test" }, { 1,"test" } };

the compiler thinks you are declaring a new struct, which obviously is not complete.

edited Mar 14, 2016 at 18:41

answered Mar 14, 2016 at 18:33

R Sahu

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1 Comment

stdcerr Over a year ago

Please see EDIT1 above

machine_1 · Accepted Answer · 2016-03-14 18:44:26Z

0

Try this instead:

#include <stdio.h>
#define PORT_ID_MAX_CHAR                6

typedef struct tPortMap {
    int phys;
    char name[PORT_ID_MAX_CHAR];
}tPortMap;

int main(void)
{
    tPortMap c_portMap[] = { { 0, "test" }, { 1,"test" } };

    printf("%s\n", c_portMap[0].name);
    return 0;
}

answered Mar 14, 2016 at 18:44

machine_1

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