结构体数组， 动态申请结构体数组

#include <stdio.h>
#include <stdlib.h>

typedef struct sf
{
    int n;
    char c;
} fc;        //定义结构体sf，给他起个别名fc


    int
main ( int argc, char *argv[] )
{
    int i = 0;
    struct sf xx[8];    //一个struct sf组成的数组xx
    fc * yy;        //指向fc类型的指针yy

    for (i = 0; i < 8; i++)
    {
        xx[i].n = i;
        (*(xx + i)).c = 'a' + i;
        //(*(xx + i)).c 等价于 xx[i].c 等价于(xx + i)->c

    }
    for (i--; i > -1; i--)    //逆序输出
        printf ("%d%c  ", (*(xx + i)).n, xx[i].c);
    puts ("");
    

    yy = (fc *) malloc (8 * sizeof (fc));    //动态申请结构体数组
    if (yy == NULL)
    {
        puts ("Memory allocation failed.");
        exit (EXIT_FAILURE);
    }        //申请失败则提示并退出程序
    for (i = 0; i < 8; i++)
    {
        yy[i].n = i;
        (*(yy + i)).c = 'A' + i;
    }
    for (i--; i > -1; i--)
        printf ("%d%c  ", (*(yy + i)).n, yy[i].c);
    free (yy);
    puts ("");
    

    

    return EXIT_SUCCESS;
}                /* ----------  end of function main  ---------- */