I want ask some questions 1) I want get string yyyymmdd of system date using linux c how should I do it ? And I want use this string do some arithmetic, like I have “20160317” I want do 20160317 – 90 get a new date,pls help
2)
int n; int m; n = (m%10 = 0)?(m/10):(m/10+1);
is there some cleaner way to do this? like if m = 11 n will get 2, m = 10 n will get 1.
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Answer
You can convert from a string to a time structure using strptime (Linux only). This will set the time on a tm struct that is passed to it.
You can then use the ctime library. It will let you use difftime
which will give you get the difference between two times.