Question

所以我的代码基本上是这样的：

    #include <time.h>

    struct tm time_check;
    time_check.tm_year = 2018;
    time_check.tm_mon  = 03;
    time_check.tm_mday = 28;

    if(mktime(&time_check) != -1)

条件每次都是假的，但是为什么呢？日期正确吗？

Answer 1

有必要初始化tm结构，并且年份必须减去1900。尝试以下代码：

    struct tm time_check;
time_t now;
time( &now );
localtime_s( &time_check, &now );
time_check.tm_year = 2018-1900;
time_check.tm_mon = 03;
time_check.tm_mday = 28;
if( mktime( &time_check ) != -1 )

mktime（＆time_check）仅返回“ -1”

1 个答案: