clock.h
来自「C语言库函数的源代码,是C语言学习参考的好文档。」· C头文件 代码 · 共 33 行
H
33 行
/* +++Date last modified: 05-Jul-1997 */
/* =======================================================================
CLOCK.H A simple macro based implementation of the ANSI/ISO
standard clock() function and related items.
Some older C compilers for DOS do not implement these
items. E.g.: Turbo C 1.5 ... This file fixes it.
WARNING: There is no provision for handling the
24-hour/midnight rollover problem.
Suggested use: #include this file _after_ time.h if
there are problems related to clock().
v1.00 95-10-19 Initial version.
_____ This version is Public Domain.
/_|__| Auke Reitsma, Delft, The Netherlands.
/ | \ --------------------------------------------------------------- */
#ifndef CLOCKS_PER_SEC
#include "extkword.h" /* from Snippets, for definition of FAR */
typedef long clock_t;
#define clock() *((clock_t FAR *)0x0040006cL)
#define CLOCKS_PER_SEC 18.2
#define CLK_TCK 18.2 /* Non-ANSI/ISO but _very_ common. */
#endif
/* === clock.h end ===================================================== */
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