[問題] 估計pi...

看板C_and_CPP作者td00414955 (banana)時間13年前 (2011/04/09 01:20)推噓0(0推 0噓 9→)

留言9則, 4人參與討論串1/2 (看更多)

開發平台(Platform): (Ex: VC++, GCC, Linux, ...) C++ 問題(Question)：只能跑到4316個數餵入的資料(Input)： 10000 程式碼(Code)：(請善用置底文網頁, 記得排版) #include "stdafx.h" #include "iostream" using namespace std; int s(int a); double squ(double b); int _tmain(int argc, _TCHAR* argv[]) { int n,count=0; double u1,u2; cout <<"現在要來估計pi" <<endl; cout <<"請輸入要用多少點來估計" <<endl; cin >>n; for(int i=1;i<=n;i++) { u1=double(s(i))/2147483647; u2=double(s(i))/2147484000; cout <<"第" <<i <<"個u1=" <<u1 <<"\tu2=" <<u2<<endl; if(squ(2*u1-1)+squ(2*u2-1)<1) { ++count; } } cout <<"落在圓內的數有" <<count <<"個" <<endl; cout <<"估計出來的pi為:" <<4.0*count/n <<endl; return 0; } int s(int a) { int s0=100000000,s1; if(a==1) { return (16807*s0)%2147483647; } else { s1=(16807*s(a-1))%2147483647; if(s1<0) { s1=s1+2147483647; } return s1; } } double squ(double b) { return b*b; } -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 60.248.22.40

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tropical72

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TsinTa

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tropical72

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