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Showing content from https://en.cppreference.com/w/cpp/language/../algorithm/../../cpp/chrono/c/CLOCKS_PER_SEC.html below:

CLOCKS_PER_SEC - cppreference.com

C++ Compiler support Freestanding and hosted Language Standard library Standard library headers Named requirements Feature test macros (C++20) Language support library Concepts library (C++20) Diagnostics library Memory management library Metaprogramming library (C++11) General utilities library Containers library Iterators library Ranges library (C++20) Algorithms library Strings library Text processing library Numerics library Date and time library Input/output library Filesystem library (C++17) Concurrency support library (C++11) Execution control library (C++26) Technical specifications Symbols index External libraries [edit] Date and time library Time point time_point

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CLOCKS_PER_SEC

Types tm time_t clock_t timespec

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[edit]

Defined in header

<ctime>

#define CLOCKS_PER_SEC /* implementation-defined */

Expands to an expression (not necessarily a compile-time constant) of type std::clock_t equal to the number of clock ticks per second, as returned by std::clock().

[edit] Notes

POSIX defines CLOCKS_PER_SEC as 1'000'000, regardless of the actual precision of std::clock().

[edit] Example

Run this code

#include <ctime>
#include <iostream>
#include <locale>
 
int main()
{
    const std::clock_t cps{CLOCKS_PER_SEC};
    std::cout.imbue(std::locale("en_US.utf8"));
    std::cout << cps << '\n';
}

Possible output:

1,000,000
[edit] See also clock returns raw processor clock time since the program is started
(function) [edit] clock_t process running time
(typedef) [edit] C documentation

for

CLOCKS_PER_SEC

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