[已解决]为什么b1,b2是未初始化局部变量啊

shallow丶

#include<stdio.h>

struct Date
{
        int year;
        int month;
        int day;
};

struct Book
{
        char title[128];
        char author[40];
        float price;
        struct Date date;
        char publisher[40];
};

struct Book getInput(struct Book book);
void printBook(struct Book book);

struct Book getInput(struct Book book)
{
        printf("请输入书名：");
        scanf_s("%s", book.title);
        printf("请输入作者：");       
        scanf_s("%s", book.author);
        printf("请输入价格：");
        scanf_s("%.2f", &book.price);
        printf("请输入日期：");
        scanf_s("%d-%d-%d", &book.date.year, &book.date.month, &book.date.day);
        printf("请输入出版社：");
        scanf_s("%s", book.publisher);

        return book;
}

void printBook(struct Book book)
{
        printf("书名：%s\n", book.title);
        printf("作者：%s\n", book.author);
        printf("售价：%.2f\n", book.price);
        printf("日期：%d-%d-%d\n", book.date.year, book.date.month, book.date.day);
        printf("出版社：%s\n", book.publisher);
}

int main(void)
{
        struct Book b1, b2;

        printf("请录入第一本书的信息：\n");
        b1 = getInput(b1);
        putchar('\n');
        printf("请录入第二本书的信息：\n");
        b2 = getInput(b2);

        printf("\n\n录入完毕，现在开始打印...\n\n");

        printf("打印第一本书的信息...");
        printBook(b1);
        putchar('\n');
        printf("打印第二本书的信息...");
        printBook(b2);

        return 0;
}

最佳答案

月排行榜 / 总排行榜

人造人

2021-12-16 22:13:45

#include <stdio.h>

struct Date
{
        int year;
        int month;
        int day;
};

struct Book
{
        char title[128];
        char author[40];
        float price;
        struct Date date;
        char publisher[40];
};

//struct Book getInput(struct Book book);
//void printBook(struct Book book);

//struct Book getInput(struct Book book)
//struct Book *getInput(struct Book *book)
void getInput(struct Book *book)
{
        printf("请输入书名：");
        //scanf_s("%s", book.title);
        scanf("%s", book->title);
        printf("请输入作者：");       
        //scanf_s("%s", book.author);
        scanf("%s", book->author);
        printf("请输入价格：");
        //scanf_s("%.2f", &book.price);
        scanf("%2f", &book->price);
        printf("请输入日期：");
        //scanf_s("%d-%d-%d", &book.date.year, &book.date.month, &book.date.day);
        scanf("%d-%d-%d", &book->date.year, &book->date.month, &book->date.day);
        printf("请输入出版社：");
        //scanf_s("%s", book.publisher);
        scanf("%s", book->publisher);

        //return book;
}

//void printBook(struct Book book)
void printBook(struct Book *book)
{
        /*
        printf("书名：%s\n", book.title);
        printf("作者：%s\n", book.author);
        printf("售价：%.2f\n", book.price);
        printf("日期：%d-%d-%d\n", book.date.year, book.date.month, book.date.day);
        printf("出版社：%s\n", book.publisher);
        */
        printf("书名：%s\n", book->title);
        printf("作者：%s\n", book->author);
        printf("售价：%.2f\n", book->price);
        printf("日期：%d-%d-%d\n", book->date.year, book->date.month, book->date.day);
        printf("出版社：%s\n", book->publisher);
}

int main(void)
{
        struct Book b1, b2;

        printf("请录入第一本书的信息：\n");
        //b1 = getInput(b1);
        getInput(&b1);
        putchar('\n');
        printf("请录入第二本书的信息：\n");
        //b2 = getInput(b2);
        getInput(&b2);

        printf("\n\n录入完毕，现在开始打印...\n\n");

        printf("打印第一本书的信息...");
        //printBook(b1);
        printBook(&b1);
        putchar('\n');
        printf("打印第二本书的信息...");
        //printBook(b2);
        printBook(&b2);

        return 0;
}

跳转到最佳答案楼层

人造人

#include <stdio.h>

struct Date
{
        int year;
        int month;
        int day;
};

struct Book
{
        char title[128];
        char author[40];
        float price;
        struct Date date;
        char publisher[40];
};

//struct Book getInput(struct Book book);
//void printBook(struct Book book);

//struct Book getInput(struct Book book)
//struct Book *getInput(struct Book *book)
void getInput(struct Book *book)
{
        printf("请输入书名：");
        //scanf_s("%s", book.title);
        scanf("%s", book->title);
        printf("请输入作者：");       
        //scanf_s("%s", book.author);
        scanf("%s", book->author);
        printf("请输入价格：");
        //scanf_s("%.2f", &book.price);
        scanf("%2f", &book->price);
        printf("请输入日期：");
        //scanf_s("%d-%d-%d", &book.date.year, &book.date.month, &book.date.day);
        scanf("%d-%d-%d", &book->date.year, &book->date.month, &book->date.day);
        printf("请输入出版社：");
        //scanf_s("%s", book.publisher);
        scanf("%s", book->publisher);

        //return book;
}

//void printBook(struct Book book)
void printBook(struct Book *book)
{
        /*
        printf("书名：%s\n", book.title);
        printf("作者：%s\n", book.author);
        printf("售价：%.2f\n", book.price);
        printf("日期：%d-%d-%d\n", book.date.year, book.date.month, book.date.day);
        printf("出版社：%s\n", book.publisher);
        */
        printf("书名：%s\n", book->title);
        printf("作者：%s\n", book->author);
        printf("售价：%.2f\n", book->price);
        printf("日期：%d-%d-%d\n", book->date.year, book->date.month, book->date.day);
        printf("出版社：%s\n", book->publisher);
}

int main(void)
{
        struct Book b1, b2;

        printf("请录入第一本书的信息：\n");
        //b1 = getInput(b1);
        getInput(&b1);
        putchar('\n');
        printf("请录入第二本书的信息：\n");
        //b2 = getInput(b2);
        getInput(&b2);

        printf("\n\n录入完毕，现在开始打印...\n\n");

        printf("打印第一本书的信息...");
        //printBook(b1);
        printBook(&b1);
        putchar('\n');
        printf("打印第二本书的信息...");
        //printBook(b2);
        printBook(&b2);

        return 0;
}

海的上方是天空

定义 b1 , b2 的时候没有初始化啊

shallow丶

人造人 发表于 2021-12-16 22:13

还得是指针啊

人造人

shallow丶 发表于 2021-12-17 14:10
还得是指针啊

对呀