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  1. #include <iostream>
  2. #include<cstdlib>
  3. #include<ctime>
  4. #include<cmath>
  5. #define RPT 1000*1000*10
  6. #define RPT_J 1
  7. int main(){
  8.     int number[1000]={0};
  9.     for(auto nmbr = 0; nmbr<1000; nmbr++)
  10.         number[nmbr]=0;
  11.     long long i=0;
  12.     long long j=0;
  13.     long long digit_1 = 0;
  14.     long long digit_2 = 0;
  15.     long long digit_3 = 0;
  16.     int z=0;
  17.     double digit_prob[3];
  18.  
  19.     for(j=0; j < RPT_J; j ++)
  20.     {
  21.         for(i=0; i < RPT; i ++)
  22.         {
  23.             z=pow(1000, (rand()%(RAND_MAX))/static_cast<double>(RAND_MAX));
  24.             if(z>99 && z<1000)
  25.             {
  26.                 digit_3++;
  27.             }
  28.             else if (z>9 && z<100)
  29.             {
  30.                 digit_2++;
  31.             }
  32.             else
  33.             {
  34.                 digit_1++;
  35.             }
  36.             number[z%1000]++;
  37.         }
  38.         digit_prob[1 -1] = (100.d*digit_1/static_cast<double>(i*(j+1)));
  39.         digit_prob[2 -1] = (100.d*digit_2/static_cast<double>(i*(j+1)));
  40.         digit_prob[3 -1] = (100.d*digit_3/static_cast<double>(i*(j+1)));
  41.         std::cout<<"J: "<<j+1<<std::endl;
  42.         std::cout<<"1 digit : "<<digit_prob[1 -1]<<" %"<<std::endl;
  43.         std::cout<<"2 digit : "<<digit_prob[2 -1]<<" %"<<std::endl;
  44.         std::cout<<"3 digit: "<<digit_prob[3 -1]<<" %"<<std::endl;
  45.     }
  46.     for(auto nmbr = 1; nmbr<10; nmbr++)
  47.         std::cout<<nmbr<<": "<<100.d*static_cast<double>(number[nmbr])/(i*j)<<" %"<<std::endl;
  48.     return 0;
  49. }
  50.  
  51.  
Success #stdin #stdout 1.98s 3412KB
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stdin
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Standard input is empty
stdout
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J: 1
1 digit : 33.3214 %
2 digit : 33.3466 %
3 digit: 33.332 %
1: 10.0455 %
2: 5.84863 %
3: 4.16293 %
4: 3.22959 %
5: 2.63758 %
6: 2.23286 %
7: 1.93102 %
8: 1.70311 %
9: 1.53023 %
https://ideone.com/aD3Naw
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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