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˵Ã÷£º±¾ÀýÖÐÏÈÈ¡0µ½20000Ö®¼äµÄËæ»úÊý£¬È»ºóÔÙÓÃÕâЩµã³ýÒÔ10000¼´¿ÉµÃµ½0µ½2Ö®¼äµÄËæ»úÊý£¬Ëæ»úÊý¾«¶ÈΪÎåλÓÐЧÊý¡£
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#include
#include    //setwº¯Êý,setprecisionº¯Êý
#include       //timeº¯Êý
#include     //srand,randº¯Êý
using namespace std;
int main()
{
        int dwCount;
        cout<<"ÇëÊäÈë´òµãµÄÊýÄ¿"<         cin>>dwCount;            //×Ô¼ºÊäÈëËùҪȡµÄµãÊý¡£
        double j,k;
        double x,y;
        double m=0;
    for(int i=0;i         {
                j=(int)(20000.0*rand()/(RAND_MAX+0));//È¡´Ó0µ½20000Ö®¼äµÄËæ»úÊý
                k=(int)(20000.0*rand()/(RAND_MAX+0));//È¡´Ó0µ½20000Ö®¼äµÄËæ»úÊý
            x=j/10000; /*ÓøղÅËùÈ¡µÃËæ»úÊý³ýÒÔ10000¾ÍÊÇ0µ½2Ö®¼äµÄËæ»úÊý£¬5λÓÐЧÊý×Ö£¬´ú±íºá×ø±ê*/
                y=k/10000;   /*ÓøղÅËùÈ¡µÃËæ»úÊý³ýÒÔ10000¾ÍÊÇ0µ½2Ö®¼äµÄËæ»úÊý£¬5λÓÐЧÊý×Ö£¬´ú±í×Ý×ø±ê*/
                if(((x-1)*(x-1)+(y-1)*(y-1))<=1)    //ÅжÏËùÈ¡µÃµãÊÇ·ñÔÚÔ²ÄÚ
                {
           m++;   //Èç¹ûÕâ¸öËùÈ¡µÃµãÔÚÔ²ÄÚ£¬Ôò¼ÆÊýÆ÷¼Ó1
                }       
                cout<         }
        cout<         double s=m/dwCount;    //ÓÃÔ²ÄڵĵãÊý³ýÒÔËùÈ¡µÃµãÊý,µÃµ½Ò»¸ö±ÈÀý
        cout<     double t=4*s;    /*ÓøղŵĵãÊý³ËÒÔ4¾ÍÊÇÔ²µÄÃæ»ý£¬ÒòΪÕâÀï×öÁËÌØÊ⣬ËùÒÔÕâ¸öÖµÒ²¾ÍÊÇÔ²ÖÜÂÊ*/
    cout< return 0;
}
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