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I want to find out for how long (approximately) some block of code executes. Something like this:
startStopwatch(); // do some calculations stopStopwatch(); printf("%lf", timeMesuredInSeconds); How?
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time() function in C The time() function is defined in time. h (ctime in C++) header file. This function returns the time since 00:00:00 UTC, January 1, 1970 (Unix timestamp) in seconds. If second is not a null pointer, the returned value is also stored in the object pointed to by second.
C library function - time() The C library function time_t time(time_t *seconds) returns the time since the Epoch (00:00:00 UTC, January 1, 1970), measured in seconds. If seconds is not NULL, the return value is also stored in variable seconds.
We can use the clock() function provided by the <time. h> header file to calculate the CPU time consumed by a task within a C application. It returns the clock_t type, which stores the total number of clock ticks.
The simplest and most intuitive way to measure time is to use a stopwatch manually from the moment you start a program. Assuming you manage to start the stopwatch and the program at the same time, the option requires the program to print a certain warning at the end of execution or at the end of a subroutine.
You can use the clock method in time.h
Example:
clock_t start = clock(); /*Do something*/ clock_t end = clock(); float seconds = (float)(end - start) / CLOCKS_PER_SEC; If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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