#include <stdio.h>

       #include <stdlib.h>

       #include <string.h>

       #include <openssl/safestack.h>

      

       #define sk_Student_new(st) SKM_sk_new(Student, (st))

       #define sk_Student_new_null() SKM_sk_new_null(Student)

       #define sk_Student_free(st) SKM_sk_free(Student, (st))

       #define sk_Student_num(st) SKM_sk_num(Student, (st))

       #define sk_Student_value(st, i) SKM_sk_value(Student, (st), (i))

       #define sk_Student_set(st, i, val) SKM_sk_set(Student, (st), (i), (val))

       #define sk_Student_zero(st) SKM_sk_zero(Student, (st))

       #define sk_Student_push(st, val) SKM_sk_push(Student, (st), (val))

       #define sk_Student_unshift(st, val) SKM_sk_unshift(Student, (st), (val))

       #define sk_Student_find(st, val) SKM_sk_find(Student, (st), (val))

       #define sk_Student_delete(st, i) SKM_sk_delete(Student, (st), (i))

       #define sk_Student_delete_ptr(st, ptr) SKM_sk_delete_ptr(Student, (st), (ptr))

       #define sk_Student_insert(st, val, i) SKM_sk_insert(Student, (st), (val), (i))

       #define sk_Student_set_cmp_func(st, cmp) SKM_sk_set_cmp_func(Student, (st), (cmp))

       #define sk_Student_dup(st) SKM_sk_dup(Student, st)

       #define sk_Student_pop_free(st, free_func) SKM_sk_pop_free(Student, (st), (free_func))

       #define sk_Student_shift(st) SKM_sk_shift(Student, (st))

       #define sk_Student_pop(st) SKM_sk_pop(Student, (st))

       #define sk_Student_sort(st) SKM_sk_sort(Student, (st))

      

       typedef    struct      Student_st

       {

              char       *name;

              int           age;

              char       *otherInfo;

       }Student;

       typedef    STACK_OF(Student)     Students;

      

       Student *Student_Malloc()

       {

              Student *a=malloc(sizeof(Student));

              a->name=malloc(20);

              strcpy(a->name,"zcp");

              a->otherInfo=malloc(20);

              strcpy(a->otherInfo,"no info");

              return a;

       }

      

       voidStudent_Free(Student *a)

       {

              free(a->name);

              free(a->otherInfo);

              free(a);

       }

 

       static       int Student_cmp(Student *a,Student *b)

       {

              int           ret;

 

              ret=strcmp(a->name,b->name);

              return ret;

       }

      

       int    main()

       {

              Students         *s,*snew;

              Student          *s1,*one,*s2;

              int                  i,num;

      

              s=sk_Student_new_null();

              snew=sk_Student_new(Student_cmp);

              s2=Student_Malloc();

              sk_Student_push(snew,s2);

              i=sk_Student_find(snew,s2);

              s1=Student_Malloc();

              sk_Student_push(s,s1);

              num=sk_Student_num(s);

              for(i=0;i<num;i++)

              {

                     one=sk_Student_value(s,i);

                     printf("student name :    %s\n",one->name);

                     printf("sutdentage  :     %d\n",one->age);

                     printf("student otherinfo :      %s\n\n\n",one->otherInfo);

              }

              sk_Student_pop_free(s,Student_Free);

              sk_Student_pop_free(snew,Student_Free);

              return 0;

              }