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STL function object definition and its application in STL is what, for this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more want to solve this problem of small partners to find a simpler and easier way.

1. Definition and instance of function object

1.1 defined

Function object: An object overloaded with operator () that can be used as a function.

1.2 examples

#include using namespace std;class Add{public: int operator() (int val1, int val2) { return val1 + val2; }};int main(int argc, char *argv[]){ Add add;cout

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