Class structure in C language - dot

stay Visual Studio Tape to be compiled in " Order number " The structure of the body , Need to put main.cpp Change it to main.c, To compile through .

Example ,main.c

#include <stdio.h>

struct tagOPClass {
    int a, b, c, d;
    ssize_t(*read) (int input);
};


int myread(int input)
{
    printf("myread input=%d\n", input + 1);
    return input + 1;
}

int main()
{
    struct tagOPClass opClass = {
    .a = 1,
    .c = 3, 4,  //3,4  It's right .c and .d Assignment     
    .b = 5,
    .read = myread
    };

    printf("opClass.a=%d ", opClass.a);
    printf("opClass.b=%d ", opClass.b);
    printf("opClass.c=%d ", opClass.c);
    printf("opClass.d=%d \n", opClass.d);

    printf("opClass.d=%d \n", opClass.read(97));


    printf("%s  Hello to you !\n", "demohello");
    int i = 0;

    /*
    pid_t pid = 0;
    if ((pid = fork()) > 0)
    {
        int n = 0;
        while (true)
        {

            n = n - 1;
            printf("fork=%d\n", n);
            sleep(10);
           // return 0;
        }
        //exit(0); //  End subprocess 
    }
    */

    while (0)
    {
        i = i + 2;
        printf("value=%d\n", i);
    }

    //fork();
    getchar();
    return 0;
}