ISO 8601到C中的time_t转换,反之亦然

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

int main() {
    // 将ISO 8601格式的字符串转换为time_t类型
    const char *iso8601 = "2022-01-01T00:00:00Z";
    struct tm tm;
    sscanf(iso8601, "%d-%d-%dT%d:%d:%dZ",
           &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
           &tm.tm_hour, &tm.tm_min, &tm.tm_sec);
    tm.tm_year -= 1900;
    tm.tm_mon -= 1;
    time_t t = mktime(&tm);
    printf("ISO 8601 to time_t: %ld\n", t);

    // 将time_t类型转换为ISO 8601格式的字符串
    t = 1646246400; // 2022-03-01T00:00:00Z
    gmtime_r(&t, &tm);
    char iso8601_buf[20];
    strftime(iso8601_buf, sizeof(iso8601_buf), "%Y-%m-%dT%H:%M:%SZ", &tm);
    printf("time_t to ISO 8601: %s\n", iso8601_buf);

    return 0;
}