#include <stdio.h>
#define MAX_TITLE_SIZE 20
#define MAX_BOOKS 10
struct Book {
int _isbn;
float _price;
int _year;
char _title[MAX_TITLE_SIZE + 1];
int _qty;
};
void clear(void);
int readRecord(FILE *fp, struct Book *b2read);
void displayInventory(const char filename[]);
int main(void) {
struct Book myBook;
char filename[21] = "144_w9_inventory.txt";
displayInventory(filename);
return 0;
}
void clear(void) {
while (getchar() != '\n');
}
int readRecord(FILE *fp, struct Book *b2read){
//Define a variable int rv = 0
int rv = 0;
rv = fscanf(fp, "%d;%f;%d;%d;%20[^\n]", &(b2read->_isbn), &(b2read->_price), &(b2read->_year), &(b2read->_qty), b2read->_title);
//return rv;
return rv;
}
void displayInventory(const char filename[]) {
struct Book myBook;
FILE *fp = NULL;
int i;
fp = fopen(filename, "r"); //open the file for reading
if (fp != NULL) {
printf("\n\nInventory\n");
printf("===================================================\n");
printf("ISBN Title Year Price Quantity\n");
printf("---------+-------------------+----+-------+--------\n");
while(readRecord(fp, &myBook) == 5){
printf("%-10.0d%-20s%-5d$%-8.2f%-8d\n", myBook._isbn, myBook._title, myBook._year, myBook._price, myBook._qty);
}
printf("===================================================\n");
printf("\n");
fclose(fp);
}
else {
printf("Failed to open file\n");
}
}
什么是文本文件,里面是:如何从C文本文件中扫描值时清除输入缓冲区?
234562;23.99;2010;3;Harry Potter
567890;12.67;2015;4;The Hunger Games
109821;53.20;2017;2;Stranger Things
输出:
Inventory
===================================================
ISBN Title Year Price Quantity
---------+-------------------+----+-------+--------
234562 Harry Potter
2010 $23.99 3
567890 The Hunger Games
2015 $12.67 4
109821 Stranger Things 2017 $53.20 2
===================================================
当我输出的程序,我能得到的所有值,但由于某种原因,当我打印这些值,整个字符串变为一半,然后向下移动一行。
的repl.it在这里,如果你想看看:
我如何得到输出单行打印出来;而不是阅读\ n“新行”,如果是这样的话?
这个代码看起来很好,和我的系统上按预期工作。无法复制;你确定这与你在运行代码的在线测试环境没有关系吗? –
你是对的@DavidBowling,它在Visual Studio上工作,但它在repl.it环境中编译的方式不同。我使用repl.it来测试我的输出,而不是每次我想测试某些东西时都必须创建一个VS的新实例。 – mincedMinx