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practical_exercises/10_day_practice/day7/[]与()例题/example1.cpp

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+#include<iostream>
+using namespace std;
+class X
+{public:
+	int operator() (int i=0)
+	{ cout << "X::operator(" << i << ")" << endl; return i; };
+	int operator() (int i, int j)
+	{ cout << "X::operator(" << i << "," << j << ")" << endl; 
+			return i; };
+	int operator[] (int i)
+	{ cout << "X::operator[" << i << "]" << endl; return i; };
+	int operator[] (char * cp)
+	{ cout << "X::operator[" << cp << "]" << endl; return 0; };
+};
+int main (void)
+{	X obj;	int i = obj (obj (1), 2);
+	int a = obj[i];	int b = obj["abcd"];
+    cout<<"a="<<a<<endl;
+    cout<<"b="<<b<<endl;
+    system("pause");
+}