delay.cpp

VC++环境下的延时程序。sleep函数

/*#include <stdio.h> 
#include <time.h> 

void delay(double seconds) 
{ 
clock_t t = clock(); 
while((double)(clock() - t) / (double)CLOCKS_PER_SEC<seconds); 
} 

int main() 
{ 
printf("我 \n"); 
delay(60); 
printf("爱 \n"); 
delay(60); 
printf("她 \n"); 
delay(60); 
return 0; 
} */


/*#include <iostream>
#include <string>
#include <time.h>
using namespace std;
void sleep( clock_t wait ) 
{ 
clock_t goal; 
goal = wait + clock(); 
while( goal > clock() ) 
; 
} 
int main()
{char cpp;string string3;int t=10000;
cout<<endl;
string3="感";cout<<string3;sleep(t); string3="悟";cout<<string3;sleep(t); string3="生";cout<<string3;sleep(t); string3="命";cout<<string3;sleep(t); string3="中";cout<<string3;sleep(t); string3="的";cout<<string3;sleep(t); string3="得";cout<<string3;sleep(t); string3="与";cout<<string3;sleep(t); string3="失";cout<<string3;sleep(t); string3="、";cout<<string3;sleep(t); string3="成";cout<<string3;sleep(t); string3="与";cout<<string3;sleep(t); string3="败";cout<<string3;sleep(t); string3="、";cout<<string3;sleep(t); string3="快";cout<<string3;sleep(t); string3="乐";cout<<string3;sleep(t); string3="与";cout<<string3;sleep(t); string3="忧";cout<<string3;sleep(t); string3="伤";cout<<string3;sleep(t); string3="。";cout<<string3;sleep(t); 
cout<<endl<<endl;
string3="我";cout<<string3;sleep(t); string3="们";cout<<string3;sleep(t); string3="得";cout<<string3;sleep(t); string3="到";cout<<string3;sleep(t); string3="启";cout<<string3;sleep(t); string3="示";cout<<string3;sleep(t); cout<<endl;
string3="那";cout<<string3;sleep(t); string3="是";cout<<string3;sleep(t); string3="对";cout<<string3;sleep(t); string3="自";cout<<string3;sleep(t); string3="己";cout<<string3;sleep(t); string3="重";cout<<string3;sleep(t); string3="新";cout<<string3;sleep(t); string3="认";cout<<string3;sleep(t); string3="识";cout<<string3;sleep(t); string3="的";cout<<string3;sleep(t); string3="过";cout<<string3;sleep(t); string3="程";cout<<string3;sleep(t); string3="，";cout<<string3;sleep(t); string3="我";cout<<string3;sleep(t); string3="们";cout<<string3;sleep(t); string3="从";cout<<string3;sleep(t); string3="阵";cout<<string3;sleep(t); string3="痛";cout<<string3;sleep(t); string3="中";cout<<string3;sleep(t); string3="惊";cout<<string3;sleep(t); string3="醒";cout<<string3;sleep(t); string3="，";cout<<string3;sleep(t); string3="正";cout<<string3;sleep(t); string3="确";cout<<string3;sleep(t); string3="地";cout<<string3;sleep(t); string3="判";cout<<string3;sleep(t); string3="断";cout<<string3;sleep(t); string3="，";cout<<string3;sleep(t); string3="才";cout<<string3;sleep(t); string3="会";cout<<string3;sleep(t); string3="实";cout<<string3;sleep(t); string3="现";cout<<string3;sleep(t); string3="最";cout<<string3;sleep(t); string3="终";cout<<string3;sleep(t); string3="的";cout<<string3;sleep(t); string3="超";cout<<string3;sleep(t); string3="越";cout<<string3;sleep(t); string3="。";cout<<string3;sleep(t); 
cout<<endl<<endl;
string3="我";cout<<string3;sleep(t); string3="们";cout<<string3;sleep(t); string3="追";cout<<string3;sleep(t); string3="求";cout<<string3;sleep(t); string3="改";cout<<string3;sleep(t); string3="变";cout<<string3;sleep(t); cout<<endl;
string3="正";cout<<string3;sleep(t); string3="视";cout<<string3;sleep(t); string3="自";cout<<string3;sleep(t); string3="己";cout<<string3;sleep(t); string3="，";cout<<string3;sleep(t); string3="积";cout<<string3;sleep(t); string3="极";cout<<string3;sleep(t); string3="生";cout<<string3;sleep(t); string3="活";cout<<string3;sleep(t); string3="，";cout<<string3;sleep(t); string3="热";cout<<string3;sleep(t); string3="情";cout<<string3;sleep(t); string3="地";cout<<string3;sleep(t); string3="迎";cout<<string3;sleep(t); string3="接";cout<<string3;sleep(t); string3="每";cout<<string3;sleep(t); string3="一";cout<<string3;sleep(t); string3="个";cout<<string3;sleep(t); string3="带";cout<<string3;sleep(t); string3="给";cout<<string3;sleep(t); string3="你";cout<<string3;sleep(t); string3="机";cout<<string3;sleep(t); string3="会";cout<<string3;sleep(t); string3="的";cout<<string3;sleep(t); string3="黎";cout<<string3;sleep(t); string3="明";cout<<string3;sleep(t); string3="。";cout<<string3;sleep(t); 
cout<<endl<<endl;
string3="我";cout<<string3;sleep(t); string3="们";cout<<string3;sleep(t); string3="因";cout<<string3;sleep(t); string3="此";cout<<string3;sleep(t); string3="而";cout<<string3;sleep(t); string3="成";cout<<string3;sleep(t); string3="功";cout<<string3;sleep(t); cout<<endl;
string3="幸";cout<<string3;sleep(t); string3="福";cout<<string3;sleep(t); string3="生";cout<<string3;sleep(t); string3="活";cout<<string3;sleep(t); string3="在";cout<<string3;sleep(t); string3="你";cout<<string3;sleep(t); string3="的";cout<<string3;sleep(t); string3="身";cout<<string3;sleep(t); string3="边";cout<<string3;sleep(t); string3="，";cout<<string3;sleep(t); string3="领";cout<<string3;sleep(t); string3="悟";cout<<string3;sleep(t); string3="它";cout<<string3;sleep(t); string3="、";cout<<string3;sleep(t); string3="享";cout<<string3;sleep(t); string3="受";cout<<string3;sleep(t); string3="它";cout<<string3;sleep(t); string3="、";cout<<string3;sleep(t); string3="拥";cout<<string3;sleep(t); string3="有";cout<<string3;sleep(t); string3="它";cout<<string3;sleep(t); string3="……";cout<<string3;sleep(t); 
cout<<endl<<endl; 
cin>>cpp;
return 0;
    }*/


  #include   "stdio.h"   
  #include   "math.h"   
  #include   "stdlib.h"   
  #include   "time.h"   
    
  int   poissrnd(double   lambda)   
  {   
  double   rnd=(rand()+0.0)/RAND_MAX;   
  double   p=exp(-lambda);   
  double   pos=p;   
  int   k=0;   
  while(1)   
  {   
  if(pos>rnd)   
  return   k;   
  k++;   
  p*=lambda/k;   
  pos+=p;   
  }   
  }   
    
  void   main()   
  {   
  srand(time(NULL));   
  printf("%d\n",poissrnd(5));   
  }