如何在DevC ++中添加/减去时间

Question

time (&rawtime); timeinfo = localtime (&rawtime); strftime (buffer,80,"%I:%M:%S",timeinfo);

This is my code to get time. Just count buffer and it works perfectly fine. I have 2 times (Time Started and Time Finished) and I want to get its process time. Basically its Time2-Time1 formula but I don't know how to do it with this current format. Thanks!!

Answer 1

If you've got a struct tm , the first thing you'll want to do is convert it into a time_t via mktime() . time_t is more useful for subtraction since it is a simple integer, representing seconds-since-the-epoch-began. Once you have two time_t values, you can simply subtract one from the other, and the result will the number of seconds between the two times.