结构体数据录入以后输出的不对，不知道是哪里出错了
#include <stdio.h>#include <stdlib.h>
struct Date {
int year;
int month;
int day;
};
struct Book {
char title;
char author;
float price;
struct Date date;
char publisher;
};
void BookInput(struct Book *book);
void BookPrintf(struct Book *book);
void BookInput(struct Book *book) {
printf("请输入书名：");
scanf("%s", book->title);
printf("请输入作者名：");
scanf("%s", book->author);
printf("请输入价格：");
scanf("%f", &book->price);
printf("请输入出版日期：");
scanf("%d %d %d", &book->date.year, &book->date.month, &book->date.day);
printf("请输入出版社名：");
scanf("%s", book->publisher);
}
void BookPrint(struct Book *book) {
printf("书名：%s\n", book->title);
printf("作者：%s\n", book->author);
printf("价格：%.2f\n", book->price);
printf("出版日期：%d年%d月%d日\n", book->date.year, book->date.month, book->date.day);
printf("出版社：%s\n", book->publisher);
}
int main(void) {
int count = 0, i, flag;
struct Book *library;
printf("欢迎登陆图书录入系统，请录入...\n");
do {
library = (struct Book *)malloc(sizeof(struct Book));
BookInput(library);
count++;
printf("录入成功！选择是否继续录入(1是/0否)：");
scanf("%d", &flag);
getchar();
putchar('\n');
} while (flag);
printf("\n\n-------你一共录入了%d本书-------\n\n", count);
for (i = 0; i < count; i++) {
BookPrint(library);
putchar('\n');
}
return 0;
} 你第一次分配内存的时候 count 是 0！！！
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct Date {
int year;
int month;
int day;
};
struct Book {
char title;
char author;
float price;
struct Date date;
char publisher;
};
void BookInput(struct Book* book);
//void BookPrintf(struct Book* book);
void InputString(char* str)
{
char c = 0;
int i = 0;
while ((c = getchar()) != '\n')
{
if (c != '\n')
{
str = c;
i++;
}
}
str = '\0';
}
void BookInput(struct Book* book) {
printf_s("请输入书名：");
//scanf_s("%s", &book->title, 2);
InputString(book->title);
printf_s("请输入作者名：");
//scanf_s("%s", &book->author, 2);
InputString(book->author);
printf_s("请输入价格：");
scanf_s("%f", &book->price);
printf_s("请输入出版日期：");
scanf_s("%d%*c%d%*c%d%*c", &book->date.year, &book->date.month, &book->date.day);// %*c 过滤中间的字符和最后的\n
printf_s("请输入出版社名：");
//scanf_s("%s", &book->publisher, 2);
InputString(book->publisher);
}
void BookPrint(struct Book* book) {
printf_s("书名：%s\n", book->title);
printf_s("作者：%s\n", book->author);
printf_s("价格：%.2f\n", book->price);
printf_s("出版日期：%d年%d月%d日\n", book->date.year, book->date.month, book->date.day);
printf_s("出版社：%s\n", book->publisher);
}
int main(void) {
int count = 0, i, flag = 1;
struct Book* library = (struct Book*)malloc(sizeof(struct Book));
if (!library)
{
printf_s("申请空间失败!\n");
return -1;
}
printf_s("欢迎登陆图书录入系统，请录入...\n");
for (i = 1; flag; i++)
{
if (i != 1)
{
struct Book* temp = (struct Book*)realloc(library, i * sizeof(struct Book)); //重新分配内存
if (!temp)
{
printf_s("申请空间失败!\n");
return -1;
}
library = temp;
}
BookInput(&library);
count = i;
printf("录入成功！选择是否继续录入(1是/0否)：");
scanf_s("%d%*c", &flag);
}
printf_s("\n\n-------你一共录入了%d本书-------\n\n", count);
for (i = 0; i < count; i++) {
BookPrint(&library);
//putchar('\n');
}
free(library);
return 0;
}
字符串输入我重写了个方法scanf我试的时候总是不大好使
还有scanf后面我都加了个%*c过滤 \n
不然这个 \n 会带到下一次输入
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