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  1. #include<iostream>
  2. #include<vector>
  3.  
  4. using namespace std;
  5.  
  6. template <typename T, size_t N >
  7. char ( &_ArraySizeHelper( T (&arr)[N] ))[N];
  8. #define countof( arr ) (sizeof( _ArraySizeHelper( arr ) ))
  9.  
  10. template< size_t N >
  11. inline double MyFunction( double (&x)[N] ) {
  12.     int M = countof(x);
  13.     double s = 0.0;
  14.     for ( int i = 0; i < M; i++ ) {
  15.         s += x[i];
  16.     }
  17.     return s;
  18. }
  19.  
  20. template< size_t N >
  21. double BigFunction( double (* PtrFunc)( double (&)[N] ), 
  22.                                         const vector<int>& v ) {
  23.     int M = v.size();
  24.     double x[N];
  25.     for( int i = 0; i < M; i++ ) {
  26.         x[i] = 1.0;
  27.     }
  28.     double z = (* PtrFunc)( x );
  29.     return z;
  30. }
  31.  
  32. int main() {
  33.     vector<int> v;
  34.     for(int i = 0; i < 10; i++) {
  35.         v.push_back(i);
  36.     }
  37.     double w = BigFunction< 10 >( &MyFunction, v );
  38.     cout << w << endl;
  39.     return 0;
  40. }
  41.  
  42.  
Success #stdin #stdout 0s 2984KB
comments (?)
stdin 
Standard input is empty
stdout 
10
https://ideone.com/VouWlG
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
secret

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