/*--------------------------------------

     names_st.h -- names_st 结构的头文件

 --------------------------------------*/

 #ifndef NAMES_ST_H

 #define NAMES_ST_H

 #include <string.h>

 #define SLEN 32

 //结构声明

 struct names_st

 {

     char first[SLEN];

     char last[SLEN];

 };

 //类型定义

 typedef struct names_st names;

 //函数原型

 void get_names(names*);

 void show_names(const names*);

 char* s_gets(char *st, int n);

 #endif

 /*-----------------------------------------

     names_st.c -- 定义 names_st.h 中的函数

 -----------------------------------------*/

 #include <stdio.h>

 #include "names_st.h"    //包含头文件

 //函数定义

 void get_names(names *pn)

 {

     printf("Please enter your first name: ");

     s_gets(pn->first, SLEN);

     printf("Please enter your last name: ");

     s_gets(pn->last, SLEN);

 }

 void show_names(const names *pn)

 {

     printf("%s %s", pn->first, pn->last);

 }

 char* s_gets(char *st, int n)

 {

     char *ret_val, *find;

     if (ret_val = fgets(st, n, stdin))

     {

         if (find = strchr(st, '\n'))

             *find = '\0';

         else

             while (fgetc(stdin) != '\n') continue;    //处理输入行中的剩余字符

     }

     return ret_val;

 }

 /*----------------------------------------

     useheader.c -- 使用 names_st 结构

 ----------------------------------------*/

 #include <stdio.h>

 #include "names_st.h"

 #include "names_st.h"    //第2次包含头文件

 int main()

 {

     names candidate;

     get_names(&candidate);

     printf("Let's welcome ");

     show_names(&candidate);

     printf(" to this program!\n");

     return ;

 }