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#include <stdio.h>
#include <stdlib.h>
void addBook(struct Book **library);
void getinput(struct Book *book);
void printfbook(struct Book *library);
void freelibrary(struct Book *book);
struct Book{
char title[128];
char author[40];
struct Book *next;
};
void getinput(struct Book *book){
printf("请输入书名[title]\n");
scanf("%s",book->title);
printf("请输入作者[author]\n");
scanf("%s",book->author);
}
void addBook(struct Book **library){
struct Book *book,*temp;
book=NULL;
temp=NULL;
book=(struct Book*)malloc(sizeof(struct Book));
if(book==NULL){
printf("内存分配失败了");
exit(1);
}
else{
getinput(book);
}
if (*library != 0)
{
temp = *library;
*library = book;
book->next = temp;
}
else
{
*library = book;
book->next = NULL;
}
}
void printfbook(struct Book *library){
struct Book *book;
book=library;
int i=1;
while(book!=NULL){
printf("您录入的第%d本书的书名是:%s\n",i,book->title);
printf("您录入的第%d本书的作者是:%s\n",i,book->author);
i++;
book=book->next;
}
}
void freelibrary(struct Book *library){
struct Book* temp;//temp跳出函数之后会自动释放,所以不用操心他的存在
while(library!=NULL){
temp=library->next;
free(library);
library=temp;
}
}
int main(){
struct Book *library=NULL;
addBook(&library);
char ans;
while(1){
printf("是否继续录入书本?Y/N\n");
scanf("%s",&ans);
if(ans=='Y'){
printf("请继续录入书本信息\n");
addBook(&library);
}
else{
break;
}
}
printf("是否打印目录?Y/N\n");
scanf("%s",&ans);
if(ans=='Y'){
printf("开始打印书目\n");
printfbook(library);
}
else{
printf("再见了您累");
}
freelibrary(library);
return 0;
}
运行之后,打印的书名和作者会乱码。并显示单链表.EXE已停止工作。 麻烦帮我看看错误在哪,查了半天没看出来。
main函数换成这个,除了排版一共改了4处地方,功能应该正常  - int main(void)
- {
- struct Book *library = NULL;
- addBook(&library);
- char ans;
- while(1)
- {
- printf("是否继续录入书本?Y/N\n");
- getchar(); //加入这个回收enter键
- scanf("%c", &ans); //char类型,不是字符串,别用%s
-
- if(ans == 'Y')
- {
- printf("请继续录入书本信息\n");
- addBook(&library);
- }
- else
- {
- break;
- }
- }
-
- printf("是否打印目录?Y/N\n");
-
- getchar(); //加入这个回收enter键
- scanf("%c", &ans); //一样的,char类型
-
- if(ans=='Y')
- {
- printf("开始打印书目\n");
- printfbook(library);
- }
- else
- {
- printf("再见了您累");
- }
-
- freelibrary(library);
-
- return 0;
- }
复制代码
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