Use boost to get and format the time

Http://blog.csdn.net/zhaodan19861107/article/details/7428757

Using boost to get the current time is convenient and quick, and you do not need to consider cross-platform issues.

1. Output yyyymmdd

[CPP]
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1. # Include <boost/date_time/Gregorian. HPP>
2. # Define boost_date_time_source
4. STD: String strtime = boost: Gregorian: to_iso_string (\
5. Boost: Gregorian: day_clock: local_day ());
7. STD: cout <strtime. c_str () <STD: Endl;

[CPP]
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1. # Include <boost/date_time/Gregorian. HPP>
2. # Define boost_date_time_source
4. STD: String strtime = boost: Gregorian: to_iso_string (\
5. Boost: Gregorian: day_clock: local_day ());
7. STD: cout <strtime. c_str () <STD: Endl;

2. YYYYMMDD-HH output: mm: SS

[CPP]
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1. # Include <boost/date_time/posix_time/posix_time.hpp>
2. # Define boost_date_time_source
4. STD: String strtime = boost: posix_time: to_iso_string (\
5. Boost: posix_time: second_clock: local_time ());
7. // The time format in strtime is yyyymmddthhmmss. the date and time are separated by uppercase letters T.
9. Int Pos = strtime. Find ('T ');
10. Strtime. Replace (Pos, 1, STD: string ("-"));
11. Strtime. Replace (Pos + 3, 0, STD: string (":"));
12. Strtime. Replace (Pos + 6, 0, STD: string (":"));
14. STD: cout <strtime. c_str () <STD: Endl;

[CPP]
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1. # Include <boost/date_time/posix_time/posix_time.hpp>
2. # Define boost_date_time_source
4. STD: String strtime = boost: posix_time: to_iso_string (\
5. Boost: posix_time: second_clock: local_time ());
7. // The time format in strtime is yyyymmddthhmmss. the date and time are separated by uppercase letters T.
9. Int Pos = strtime. Find ('T ');
10. Strtime. Replace (Pos, 1, STD: string ("-"));
11. Strtime. Replace (Pos + 3, 0, STD: string (":"));
12. Strtime. Replace (Pos + 6, 0, STD: string (":"));
14. STD: cout <strtime. c_str () <STD: Endl;

3. Calculate the interval. There are many powerful functions for calculating the time interval in boost. I only list what I currently use.

[CPP]
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1. # Include <boost/date_time/posix_time/posix_time.hpp>
2. # Include <boost/thread. HPP>
3. # Define boost_date_time_source
5. Boost: posix_time: ptime time_now, time_now1;
6. Boost: posix_time: millisec_posix_time_system_config: time_duration_type time_elapse;
8. // Here, the unit is microsecond. Here, you can replace microsec_clock with second_clock in seconds;
9. Time_now = boost: posix_time: microsec_clock: universal_time ();
11. // Sleep 100 ms;
12. Boost: this_thread: Sleep (boost: posix_time: millisec (100 ));
14. Time_now1 = boost: posix_time: microsec_clock: universal_time ();
16. Time_elapse = time_now1-time_now;
18. // Similar to gettickcount, only the difference between the two ticket values is obtained here, in microseconds;
19. Int ticks = time_elapse.ticks ();
21. // Obtain the number of seconds between the two intervals;
22. Int sec = time_elapse.total_seconds ();

[CPP]
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1. # Include <boost/date_time/posix_time/posix_time.hpp>
2. # Include <boost/thread. HPP>
3. # Define boost_date_time_source
5. Boost: posix_time: ptime time_now, time_now1;
6. Boost: posix_time: millisec_posix_time_system_config: time_duration_type time_elapse;
8. // Here, the unit is microsecond. Here, you can replace microsec_clock with second_clock in seconds;
9. Time_now = boost: posix_time: microsec_clock: universal_time ();
11. // Sleep 100 ms;
12. Boost: this_thread: Sleep (boost: posix_time: millisec (100 ));
14. Time_now1 = boost: posix_time: microsec_clock: universal_time ();
16. Time_elapse = time_now1-time_now;
18. // Similar to gettickcount, only the difference between the two ticket values is obtained here, in microseconds;
19. Int ticks = time_elapse.ticks ();
21. // Obtain the number of seconds between the two intervals;
22. Int sec = time_elapse.total_seconds ();

From: http://blog.csdn.net/morebread/article/details/6742957

Using boost to get the current time is convenient and quick, and you do not need to consider cross-platform issues.

1. Output yyyymmdd

[CPP]
View plaincopy

1. # Include <boost/date_time/Gregorian. HPP>
2. # Define boost_date_time_source
4. STD: String strtime = boost: Gregorian: to_iso_string (\
5. Boost: Gregorian: day_clock: local_day ());
7. STD: cout <strtime. c_str () <STD: Endl;

[CPP]
View plaincopy

1. # Include <boost/date_time/Gregorian. HPP>
2. # Define boost_date_time_source
4. STD: String strtime = boost: Gregorian: to_iso_string (\
5. Boost: Gregorian: day_clock: local_day ());
7. STD: cout <strtime. c_str () <STD: Endl;

2. YYYYMMDD-HH output: mm: SS

[CPP]
View plaincopy

1. # Include <boost/date_time/posix_time/posix_time.hpp>
2. # Define boost_date_time_source
4. STD: String strtime = boost: posix_time: to_iso_string (\
5. Boost: posix_time: second_clock: local_time ());
7. // The time format in strtime is yyyymmddthhmmss. the date and time are separated by uppercase letters T.
9. Int Pos = strtime. Find ('T ');
10. Strtime. Replace (Pos, 1, STD: string ("-"));
11. Strtime. Replace (Pos + 3, 0, STD: string (":"));
12. Strtime. Replace (Pos + 6, 0, STD: string (":"));
14. STD: cout <strtime. c_str () <STD: Endl;

[CPP]
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1. # Include <boost/date_time/posix_time/posix_time.hpp>
2. # Define boost_date_time_source
4. STD: String strtime = boost: posix_time: to_iso_string (\
5. Boost: posix_time: second_clock: local_time ());
7. // The time format in strtime is yyyymmddthhmmss. the date and time are separated by uppercase letters T.
9. Int Pos = strtime. Find ('T ');
10. Strtime. Replace (Pos, 1, STD: string ("-"));
11. Strtime. Replace (Pos + 3, 0, STD: string (":"));
12. Strtime. Replace (Pos + 6, 0, STD: string (":"));
14. STD: cout <strtime. c_str () <STD: Endl;

3. Calculate the interval. There are many powerful functions for calculating the time interval in boost. I only list what I currently use.

[CPP]
View plaincopy

1. # Include <boost/date_time/posix_time/posix_time.hpp>
2. # Include <boost/thread. HPP>
3. # Define boost_date_time_source
5. Boost: posix_time: ptime time_now, time_now1;
6. Boost: posix_time: millisec_posix_time_system_config: time_duration_type time_elapse;
8. // Here, the unit is microsecond. Here, you can replace microsec_clock with second_clock in seconds;
9. Time_now = boost: posix_time: microsec_clock: universal_time ();
11. // Sleep 100 ms;
12. Boost: this_thread: Sleep (boost: posix_time: millisec (100 ));
14. Time_now1 = boost: posix_time: microsec_clock: universal_time ();
16. Time_elapse = time_now1-time_now;
18. // Similar to gettickcount, only the difference between the two ticket values is obtained here, in microseconds;
19. Int ticks = time_elapse.ticks ();
21. // Obtain the number of seconds between the two intervals;
22. Int sec = time_elapse.total_seconds ();

[CPP]
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1. # Include <boost/date_time/posix_time/posix_time.hpp>
2. # Include <boost/thread. HPP>
3. # Define boost_date_time_source
5. Boost: posix_time: ptime time_now, time_now1;
6. Boost: posix_time: millisec_posix_time_system_config: time_duration_type time_elapse;
8. // Here, the unit is microsecond. Here, you can replace microsec_clock with second_clock in seconds;
9. Time_now = boost: posix_time: microsec_clock: universal_time ();
11. // Sleep 100 ms;
12. Boost: this_thread: Sleep (boost: posix_time: millisec (100 ));
14. Time_now1 = boost: posix_time: microsec_clock: universal_time ();
16. Time_elapse = time_now1-time_now;
18. // Similar to gettickcount, only the difference between the two ticket values is obtained here, in microseconds;
19. Int ticks = time_elapse.ticks ();
21. // Obtain the number of seconds between the two intervals;
22. Int sec = time_elapse.total_seconds ();

From: http://blog.csdn.net/morebread/article/details/6742957