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  1. #include <iostream>
  2. //#include <math.h>
  3. //#include <iomanip>
  4. //#include <stdio.h>
  5. using namespace std;
  6.  
  7. double f1(double x)
  8. {
  9.     return(2*x);
  10. }
  11.  
  12. double f2(double x)
  13. {
  14.     return(x*x);
  15. }
  16.  
  17. double compute(double f(double x), double i)
  18. {
  19.        double answer;
  20.        answer = f(i);
  21.        return (answer);       
  22. }
  23.  
  24. int main()
  25. {
  26.     double input, ans;
  27.     int function;
  28.  
  29.     double (*gset[])(double)={f1,f2};
  30.  
  31.     cout << "Input Please: ";
  32.     cin >> input;
  33.     cout << "Function Please: ";
  34.     cin >> function;
  35.  
  36.     ans = compute(gset[function-1], input);
  37.     cout << ans;
  38. }
Success #stdin #stdout 0.01s 2860KB
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Input Please: Function Please: 25
https://ideone.com/cpwmZ
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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