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+= Contents =
+  - [[#C++ Examples|C++ Examples]]
+    - [[#C++ Examples#Friend operator|Friend operator]]
+
+= C++ Examples =
+
+== Friend operator ==
+
+{{{c++
+#include <iostream>
+
+class T {
+	int x;
+
+public:
+	T (int x);
+
+	friend std::ostream& operator<<(std::ostream&, const T&);
+};
+
+T::T (int x) {
+	this->x = x;
+}
+
+
+std::ostream& operator<<(std::ostream& out, const T& t) {
+	out << "T {" << t.x << "}";
+	return out;
+}
+
+int main () {
+	T t(10);
+
+	std::cout << t << std::endl;
+}
+}}}