Subtracting time from tm structure

[electroon]

Hi frnds,

I have written a code to get current time

struct tm *locTime;
time_t currentTime;
time( &currentTime );
locTime = localtime(&currentTime );

Suppose now i get output time as 31-DEC-2007 00:00:00

What i want now is i want two strings where in one string i want to subtract time to 2 hours that is one string should have value as 30-DEC-2007 22:00:00 and other string should have value 26 hours less that is 23-DEC-2007 22:00:00

I tried some cases where in i subtracted value but it was not working.Is there a way out for this

[weaknessforcats]

I don't use this time very often but I think you subtract from the time_t rather than from the struct tm.

That means you keep your times in time_t variables and use library functions to create and display the time_t variables.

The struct tm is statically allocated so all time functions use the same struct tm.