c语言图书录入管理系统

#include
#include
struct Book
{
char title[128];
char author[40];
struct Book *next;
};
void getInput(struct Book *book);
void addBook(struct Book **library);
void printlibrary(struct Book *library);
void releaselibrary(struct Book **library);

void getInput(struct Book *book)
{
printf("请输入书名：");
scanf("%s",book->title);
printf("请输入作者：");
scanf("%s",book->author);
}
void addBook(struct Book **library)
{
struct Book *book,*temp;

 book=(struct Book *) malloc(sizeof(struct Book));
 if(book == NULL)
 {
    printf("内存分配失败\n");
        exit(1);
 }
 getInput(book);
 if (*library!=NULL)
 {
     temp=*library;
     *library=book;
     book->next=temp;
 }
 else
 {
    *library=book;
    book->next=NULL;
 }

}
void printlibrary(struct Book *library)
{
struct Book *book;
int count=1;

book=library;
while(book!=NULL)
{
    printf("book%d:",count);
    printf("书名：%s",book->title);
    printf("作者：%s",book->author);
    book=book->next;
    count++;
}

}
void releaselibrary(struct Book **library)
{
struct Book *temp;

while(*library!=NULL)
{
    temp=*library;
    *library=(*library)->next;
    free(temp);
}

}
int main()
{
struct Book *library=NULL;
int ch;
while(1)
{
printf("请问是否输入书籍信息（Y/N）:");
do
{
ch=getchar();
}while(ch!='Y'&&'N');
if(ch=='Y')
{
addBook(&library);
}
else
{
break;
}
}
printf("是否打印书籍信息（Y/N）");
do
{
ch=getchar();
}while(ch!='Y'&&'N');
if(ch=='Y')
{
printlibrary(library);
}
releaselibrary(&library);

system("pause");
return 0;

}#include
#include
struct Book
{
char title[128];
char author[40];
struct Book *next;
};
void getInput(struct Book *book);
void addBook(struct Book **library);
void printlibrary(struct Book *library);
void releaselibrary(struct Book **library);

void getInput(struct Book *book)
{
printf("请输入书名：");
scanf("%s",book->title);
printf("请输入作者：");
scanf("%s",book->author);
}
void addBook(struct Book **library)
{
struct Book *book,*temp;

 book=(struct Book *) malloc(sizeof(struct Book));
 if(book == NULL)
 {
    printf("内存分配失败\n");
        exit(1);
 }
 getInput(book);
 if (*library!=NULL)
 {
     temp=*library;
     *library=book;
     book->next=temp;
 }
 else
 {
    *library=book;
    book->next=NULL;
 }

}
void printlibrary(struct Book *library)
{
struct Book *book;
int count=1;

book=library;
while(book!=NULL)
{
    printf("book%d:",count);
    printf("书名：%s",book->title);
    printf("作者：%s",book->author);
    book=book->next;
    count++;
}

}
void releaselibrary(struct Book **library)
{
struct Book *temp;

while(*library!=NULL)
{
    temp=*library;
    *library=(*library)->next;
    free(temp);
}

}
int main()
{
struct Book *library=NULL;
int ch;
while(1)
{
printf("请问是否输入书籍信息（Y/N）:");
do
{
ch=getchar();
}while(ch!='Y'&&'N');
if(ch=='Y')
{
addBook(&library);
}
else
{
break;
}
}
printf("是否打印书籍信息（Y/N）");
do
{
ch=getchar();
}while(ch!='Y'&&'N');
if(ch=='Y')
{
printlibrary(library);
}
releaselibrary(&library);

system("pause");
return 0;

}
这串代码为什么在VS里面总是只能输入不能结束和打印

while(ch!='Y'&&'N');
改为while(ch != 'Y' && ch != 'N');