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  1. #include <iostream>
  2. #include<cstdlib>
  3. #include<ctime>
  4. #define RPT 3*1000*1000*10
  5. #define RPT_J 2
  6. int main(){
  7.     int number[1000]={0};
  8.     for(auto nmbr = 0; nmbr<1000; nmbr++)
  9.         number[nmbr]=0;
  10.     long long i=0;
  11.     long long j=0;
  12.     long long digit_1 = 0;
  13.     long long digit_2 = 0;
  14.     long long digit_3 = 0;
  15.     int z=0;
  16.     double digit_prob[3];
  17.  
  18.     for(j=0; j<RPT_J;j++)
  19.     {
  20.         for(i=0; i<RPT;i++)
  21.         {
  22.             int m=rand()%3+1;
  23.             if(m==3)
  24.             {
  25.                 z=(int)rand()%900+100;
  26.                 digit_3++;
  27.             }
  28.             else if(m==2)
  29.             {
  30.                 z=(int)rand()%90+10;
  31.                 digit_2++;
  32.             }
  33.             else if(m==1)
  34.             {
  35.                 z=(int)rand()%10;
  36.                 digit_1++;
  37.             }
  38.             number[z%1000]++;
  39.         }
  40.         digit_prob[1 -1] = (100.d*digit_1/static_cast<double>(i*(j+1)));
  41.         digit_prob[2 -1] = (100.d*digit_2/static_cast<double>(i*(j+1)));
  42.         digit_prob[3 -1] = (100.d*digit_3/static_cast<double>(i*(j+1)));
  43.         std::cout<<"J: "<<j+1<<std::endl;
  44.         std::cout<<"1 digit : "<<digit_prob[1 -1]<<" %"<<std::endl;
  45.         std::cout<<"2 digit : "<<digit_prob[2 -1]<<" %"<<std::endl;
  46.         std::cout<<"3 digit: "<<digit_prob[3 -1]<<" %"<<std::endl;
  47.     }
  48.     for(auto nmbr = 0; nmbr<10; nmbr++)
  49.         std::cout<<nmbr<<": "<<100.d*static_cast<double>(number[nmbr])/(i*j)<<" %"<<std::endl;
  50.     return 0;
  51. }
  52.  
Success #stdin #stdout 3.68s 3416KB
comments (?)
stdin 
Standard input is empty
stdout 
J: 1
1 digit : 33.3378 %
2 digit : 33.3216 %
3 digit: 33.3407 %
J: 2
1 digit : 33.3445 %
2 digit : 33.3177 %
3 digit: 33.3377 %
0: 3.33389 %
1: 3.33271 %
2: 3.33004 %
3: 3.33721 %
4: 3.33425 %
5: 3.33238 %
6: 3.33622 %
7: 3.33521 %
8: 3.33538 %
9: 3.33722 %
https://ideone.com/IK3hjp
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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