【转】程序猿暖手程序 - 数学建模社区-数学中国

#include <process.h>
0 V3 d! s- k/ b
#include "windows.h"2 ~/ c8 `6 |, |7 p, ^# l/ x# {
1 e$ X2 Q1 W1 E2 C. D
double pi = 3.14;
: b2 Q4 {) \( w9 u6 {" m1 T: {- K
% N- i$ L6 ?4 {
void handwarmer(void *p); O2 c1 P, T. Z5 B1 X- F4 E
{
& G4 U f5 G" c1 f
while (1)- w, s+ o# \5 b1 S
{; S" C+ F0 l5 D' d$ C/ G$ c
//非线程同步。$ V9 _9 a3 n: _' W
pi *= pi;
) ?) L& B6 Z6 n$ @
if (pi > 1024*1024*1024)
3 b* g7 p9 p( n C: E7 B4 l1 G
pi = 3.14;' T* R ~; `4 b" w
}2 F, @/ g/ C6 N
}
{2 u; q( m, v7 y! W' E
" k2 n% S: y; n" Y8 s7 I
int main()
4 T$ q& K) ^+ N; m- y
{6 z/ \; R9 l+ U7 b2 p
SYSTEM_INFO siSysInfo;
- V U$ v+ c" u/ |2 b) y
GetSystemInfo(&siSysInfo);
0 [6 f6 q/ B. K* A
8 P" ]% ]* y% v' k. K
//n核 2n线程一样hold住8 C _1 Z- g' H4 ?
for (int i=0; i< (int)siSysInfo.dwNumberOfProcessors*2; ++i)$ T! [5 h1 ?4 R6 h" m6 ?2 h% h
_beginthread(handwarmer, 0, 0);- J% Y4 }- n6 B, ~. I! `* c
system("pause");
* r8 D J# N# G3 ~1 @1 i
return 0;) a1 ?+ C; D2 G" R+ A: E
};

复制代码