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  1. #include <functional>
  2. #include <iostream>
  3.  
  4. double function_a(double a, double b, double c, double d)
  5. {
  6.     std::cout << "function_a(" << a << ", " << b << ", " << c << ", " << d << ")\n";
  7.     return a;
  8. }
  9.  
  10. double function_b(double a, double b, int t, int u, double c)
  11. {
  12.     std::cout << "function_b(" << a << ", " << b << ", " << t << ", " << u << ", " << c << ")\n";
  13.     return a;
  14. }
  15.  
  16. struct second_func
  17. {
  18.     second_func(int t, int u, double c) :t(t), u(u), c(c) {}
  19.  
  20.     double operator()(double a, double b) { return function_b(a, b, t, u, c); }
  21.  
  22.     int t;
  23.     int u;
  24.     double c;
  25. };
  26.  
  27.  
  28. void PerformAnalysis(std::function<double(double, double)> func)
  29. {
  30.     func(4.0, 5.0);
  31. }
  32.  
  33. int main()
  34. {
  35.     auto first_func = [](double a, double b) { return function_a(a, b, 60.0, 2.1); };
  36.  
  37.     // or:
  38.     // double c = 60.0;
  39.     // double d = 1.2;
  40.     // auto first_func = [=](double a, double b) { return function_a(a, b, c, d); };
  41.  
  42.     PerformAnalysis(first_func);
  43.     PerformAnalysis(second_func(5, 90, 2.6));
  44. }
Success #stdin #stdout 0s 3416KB
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Standard input is empty
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function_a(4, 5, 60, 2.1)
function_b(4, 5, 5, 90, 2.6)
https://ideone.com/nJdS76
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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