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  1. #include <iostream>
  2. #include <numeric>
  3.  
  4. struct iter {
  5.   int n;
  6.   iter( int x ): n(x){}
  7.   int operator*(){ return (n%2)? n: 0; }
  8.   bool operator==( const iter &i ){ return n == i.n; }
  9.   bool operator!=( const iter &i ){ return !( *this == i ); }
  10.   iter &operator++(){ ++n; return *this; }
  11. };
  12.  
  13. int main(){
  14.   int sum = std::accumulate( iter(0), iter(100), 0 );
  15.   std::cout << sum << std::endl;
  16. }
Success #stdin #stdout 0.02s 2724KB
comments (?)
stdin 
Standard input is empty
stdout 
2500
https://ideone.com/PMREG
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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