clock_t
Defined in header <time.h>
|
||
---|---|---|
|
Arithmetic (until C11)Real (since C11) type capable of representing the processor time used by a process. It has implementation-defined range and precision.
Example
#include <stdio.h>
#include <time.h>
volatile unsigned sink;
int main (void)
{
clock_t start = clock();
for(size_t i=0; i<10000000; ++i)
sink++;
clock_t end = clock();
double cpu_time_used = ((double) (end - start)) / CLOCKS_PER_SEC;
printf("for loop took %f seconds to execute \n", cpu_time_used);
}
Possible output:
for loop took 0.033492 seconds to execute
References
C11 standard (ISO/IEC 9899:2011):
- 7.27.1/3 Components of time (p: 388)
C99 standard (ISO/IEC 9899:1999):
- 7.23.1/3 Components of time (p: 338)
C89/C90 standard (ISO/IEC 9899:1990):
- 4.12.1 Components of time
See also
returns raw processor clock time since the program is started (function) | |
number of processor clock ticks per second (macro constant) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
http://en.cppreference.com/w/c/chrono/clock_t