code. compile. run. debug. share.
#include <iostream>
using namespace std;
/* 下面的 add 和 sub，类型都是 int(int, int) */
int add(int a, int b)
{
return a + b;
}
int sub(int a, int b)
{
return a - b;
}
// 为 int (int, int) 类型的函数，重载流输出操作符 <<
ostream& operator << (ostream& os, int (f) (int, int))
{
os << f(1, 2); // 参数固定为 1,2
return os;
}
int main()
{
cout << add << ", " << sub << endl; // 完美结合
}
Compiling Program...
Standard Input:
Interactive Console
Text
Program is not being debugged. Click "Debug" button to start program in debug mode.
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