Project

          // written by ¼B­õ»¨
          #include <stdio.h>
          #include <stdlib.h>
          #include <unistd.h>

          typedef struct notebook
          {
            char content[16];
            void (*show_content)(char *content);
          } notebook;

          void show_type1(char *content)
          {
            puts("============================");
            printf("%s\n", content);
            puts("============================");
          }

          void show_type2(char *content)
          {
            puts("****************************");
            printf("%s\n", content);
            puts("****************************");
          }

          int main()
          {
            notebook *mynote = 0;
            mynote = (notebook*) malloc(sizeof(notebook));
            mynote->show_content = show_type1;
            puts("write your content:");
            gets(mynote->content);
            puts("This is your content:");
            mynote->show_content(mynote->content);
            return 0;
          }