下面是我查资料找到的我认为好用的两种方式，区别在于对localtime(&t)函数返回值的处理上。 我做成了getYear()和getMonth()函数，方便自己随时调用。
方法一：利用strftime()函数 strftime( ) 函数说明参考：https://blog.csdn.net/SanQi_Abao/article/details/94964665 可以获取的时间种类很多，这里只实现部分。
#include <iostream> #include <cstdio> #include <cmath> using namespace std; static string getYear() { time_t t = time(NULL); char ch[6] = { 0 }; strftime(ch, sizeof(ch) - 1, "%Y", localtime(&t)); return ch; } static string getMonth() { time_t t = time(NULL); char ch[4] = { 0 }; strftime(ch, sizeof(ch) - 1, "%m", localtime(&t)); return ch; } static string getDay() { time_t t = time(NULL); char ch[4] = { }; strftime(ch, sizeof(ch) - 1, "%d", localtime(&t)); return ch; } static string getHour() { time_t t = time(NULL); char ch[4] = { 0 }; strftime(ch, sizeof(ch) - 1, "%H", localtime(&t)); return ch; } static string getMinute() { time_t t = time(NULL); char ch[4] = { 0 }; strftime(ch, sizeof(ch) - 1, "%M", localtime(&t)); return ch; } static string getSecond() { time_t t = time(NULL); char ch[4] = { 0 }; strftime(ch, sizeof(ch) - 1, "%S", localtime(&t)); return ch; } int main() { cout << "year=" << getYear() << endl; cout << "month=" << getMonth() << endl; cout << "day=" << getDay() << endl; cout << "hour=" << getHour() << endl; cout << "minute=" << getMinute() << endl; cout << "second=" << getSecond() << endl; return 0; }方法二：利用结构体tm
//结构体tm内的成员 int tm_sec; /* Seconds. [0-60] (1 leap second) */ int tm_min; /* Minutes. [0-59] */ int tm_hour; /* Hours. [0-23] */ int tm_mday; /* Day. [1-31] */ int tm_mon; /* Month. [0-11] */ int tm_year; /* Year - 1900. */ int tm_wday; /* Day of week. [0-6] */ int tm_yday; /* Days in year.[0-365] */ int tm_isdst; /* DST. [-1/0/1]*/ //看结构体成员就知道还能获取其他时间数据，我这里就不写全了 #include <iostream> #include <cstdio> #include <cmath> using namespace std; int getYear() { time_t t; time(&t); struct tm* tmp = localtime(&t); return tmp->tm_year + 1900; } int getMonth() { time_t t; time(&t); struct tm* tmp = localtime(&t); return tmp->tm_mon + 1; } int getDay() { time_t t; time(&t); struct tm* tmp = localtime(&t); return tmp->tm_mday; } int getHour() { time_t t; time(&t); struct tm* tmp = localtime(&t); return tmp->tm_hour; } int getMinute() { time_t t; time(&t); struct tm* tmp = localtime(&t); return tmp->tm_min; } int getSeond() { time_t t; time(&t); struct tm* tmp = localtime(&t); return tmp->tm_sec; } int main() { printf("year=%d, month=%d, day=%d, hour=%d, second=%d\n", getYear(), getMonth(), getDay(), getHour(), getSeond()); //year=2020, month=7, day=2, hour=9, second=3 }======================================================== 【文章为本人的学习笔记部分的分享，有任何错误地方欢迎评论指出，万分感谢！】
