function template

This program is used to learn the function template

cpp six.hpp

@@ -0,0 +1,29 @@
+//A function template(can overloading)
+#include <iostream>
+using namespace std;
+template <typename T>
+void Swap(T &a, T &b);
+template <typename T>
+void Swap(T &a, T &b)
+{
+	T temp;
+	temp = a;
+	a = b;
+	b = temp;
+}
+int main()
+{
+	int i = 10,j=20;
+	cout << "i,j=" << i << "," << j << endl;
+	Swap(i, j);
+	cout << "using compiler-generated int swapper:" << endl;
+	cout << "Now i,j=" << i << "," << j << endl;
+	double x = 24.5;
+	double y = 81.7;
+	cout << "x,y=" << x << "," << y << endl;
+	Swap(x, y);
+	cout << "using compiler-generated double swapper:"<<endl;
+	cout << "Now x,y=" << x << "," << y << endl;
+	cin.get();
+    return 0;
+}