替代数据格式

时间:2019-03-24 21:41:01

标签: c

我有两个存储两个不同日期的结构对象。我希望确保它们的格式为(dd / mm / yyyy)| (dd-mm-yyyy),然后加以区别。

如果标准格式不是dd / mm / yyyy,则打印标准错误,但似乎不接受两种格式。

#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <errno.h>

/*
# Objective: date1.c is to write in two dates and determine the difference 
in the number of days between them.
Must be date inputs must be written into console as <day>/<month>/<year> | 
<day>-<month>-<year>
*/ 

int minimumYear = 0; // O AD
int maximumYear = 10000; // 10000 AD

// Struct for the date
typedef struct {
    int dd;
    int mm;
    int yyyy;
} dateFormat; 

混乱的主要根源...

int main() {
    dateFormat getDate1;
    dateFormat getDate2;

    //input correct date
    fprintf(stderr, "Enter date in format (day/month/year): ");
    scanf("%d/%d/%d", &getDate1.dd, &getDate1.mm, &getDate1.yyyy);

    fprintf(stderr, "Enter date in format (day/month/year): ");
    scanf("%d/%d/%d", &getDate2.dd, &getDate2.mm, &getDate2.yyyy);


}

1 个答案:

答案 0 :(得分:2)

您应该将输入作为字符串读入fgets()数组中,并尝试根据两种格式用sscanf()对其进行解析。如果两种格式都不匹配输入,请投诉:

int main() {
    char buf[128];
    dateFormat getDate1;

    //input correct date
    fprintf(stderr, "Enter date in format (day/month/year): ");
    if (!fgets(buf, sizeof buf, stdin)) {
        fprintf(stderr, "premature end of file\n");
        return 1;
    }
    if (sscanf(buf, "%d/%d/%d", &getDate1.dd, &getDate1.mm, &getDate1.yyyy) != 3
    &&  sscanf(buf, "%d-%d-%d", &getDate1.dd, &getDate1.mm, &getDate1.yyyy) != 3) {
        fprintf(stderr, "invalid date: %s", buf);
        return 1;
    }
    ...
}