获取C中时区的夏令时转换日期

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

int main() {
    time_t rawtime;
    struct tm * timeinfo;

    time(&rawtime);
    timeinfo = localtime(&rawtime);

    int isdst = timeinfo->tm_isdst;

    if (isdst == 1) {
        printf("夏令时开始日期：%d-%02d-%02d\n", timeinfo->tm_year + 1900, timeinfo->tm_mon + 1, timeinfo->tm_mday);
    } else {
        printf("夏令时结束日期：%d-%02d-%02d\n", timeinfo->tm_year + 1900, timeinfo->tm_mon + 1, timeinfo->tm_mday);
    }

    return 0;
}