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a guest Oct 21st, 2019 70 Never
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  1. #include <iostream>
  2. #include <stdio.h>
  3. #include <fstream>
  4. #include <math.h>
  5. #pragma warning( disable : 4996 )
  6. using namespace std;
  7.  
  8. double f(int r , double x)
  9. {
  10.     return r * x * (1 - x);
  11. }
  12.  
  13. int main()
  14. {
  15.     char filename[100];
  16.     for (int r = 1; r <= 4; r++)
  17.     {
  18.         sprintf(filename, "data%d.txt", r);
  19.         int n = 0;
  20.         FILE* FL;
  21.         FL = fopen(filename, "w");
  22.         double x0 = 0.1;
  23.         double x00 = 0.2;
  24.         double x000 = 0.3;
  25.         double x0000 = 0.4;
  26.        
  27.         for (n; n <= 10; n++) {
  28.             fprintf(FL, "%d  %f  %f  %f  %f \n", n, f(r, x0), f(r, x00), f(r, x000), f(r, x0000));
  29.             double x1 = f(r, x0), x11 = f(r, x00), x111 = f(r, x000), x1111 = f(r, x0000);
  30.             x0 = x1, x00 = x11, x000 = x111, x0000 = x1111;
  31.         }
  32.  
  33.         fclose(FL);
  34.     }
  35. }
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