结构体数据读入常出现的错误的解决办法

最新推荐文章于 2020-11-09 22:32:25 发布

原创最新推荐文章于 2020-11-09 22:32:25 发布 · 629 阅读

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本程序实现了一个简单的图书管理系统，用户可以输入书籍的标题、作者和价值，并查看已输入的所有书籍信息。该系统支持批量输入书籍，并在输入过程中进行错误处理，确保输入的有效性和完整性。

#include<stdio.h>
#include<stdlib.h>
#include<process.h>


#define MAXTITL 40 
#define MAXAUTL 40 
#define MAXBKS  100
struct book{
	char title[MAXTITL];
	char author[MAXAUTL];
	float value;
};


int main(void)
{
	struct book library[MAXBKS];
	int count=0;
	int index;


	printf("Please enter the book title:\n");
	printf("Press [enter] at the start of a line to stop.\n");
	while(count<MAXBKS && gets(library[count].title)!=NULL && library[count].title[0]!='\0')
	{
		printf("Now enter the author.\n");
		gets(library[count].author);
		printf("Now enter the value.\n");
		scanf("%f",&library[count++].value);//the function scanf()will leave the '\n' behind and the function gets()above will catch this '\n' and result in error!
		while(getchar()!='\n')//these two lines will demonish the influence of  "space","tab" and "enter" and so on!
			continue;
		if(count<MAXBKS)
			printf("Enter the next title.\n");
	}
	if(count>0)
	{
		printf("Here is the list of your books:\n");
		for(index=0;index<count;index++)
			printf("%s by %s:$%.2f \n",library[index].title,library[index].author,library[index].value);
	}
	else
		printf("No books? Too bad.\n");


	system("pause");
	return 0;
}