【c++基础】accumulate

accumulate

// accumulate example
#include <iostream>     // std::cout
#include <functional>   // std::minus
#include <numeric>      // std::accumulate

int myfunction (int x, int y) {return x+*y;}
struct myclass {
    int operator()(int x, int y) {return x+*y;}
} myobject;

int main () {
  int init = ;
  int numbers[] = {,,};

  std::cout << "using default accumulate: ";
  std::cout << std::accumulate(numbers,numbers+,init);
  std::cout << '\n';

  std::cout << "using functional's minus: ";
  std::cout << std::accumulate (numbers, numbers+, init, std::minus<int>());
  std::cout << '\n';

  std::cout << "using custom function: ";
  std::cout << std::accumulate (numbers, numbers+, init, myfunction);
  std::cout << '\n';

  std::cout << "using custom object: ";
  std::cout << std::accumulate (numbers, numbers+, init, myobject);
  std::cout << '\n';

  return ;
}

RE

1.accumulate-example;

End