C++类模板 .h和.cpp文件要写在一起||要在主函数main中用#include "Test.h" Test是模板类名

最好要将C++类模板的.h和.cpp文件的内容一起写在.h文件中，不要分开

C++模板类和模板函数示例：

模板类Test

Test.h

#pragma once #include <iostream> using namespace std; template<class T> class Test { public: T a; public: Test(T a); ~Test(); void printT(); }; Test.cpp

#include "Test.h" using namespace std; template<class T> Test<T>::Test(T a) { this->a = a; } template<class T> Test<T>::~Test() { } template<class T> void Test<T>::printT() { cout << a << endl; }

主程序

Source.cpp

#include <iostream> #include "Test.h" #include "Test.cpp" using namespace std; int use1(int &c) { c++; return c; } int use2(int c) { c++; return c; } template<typename T> T add(T a, T b) { return a + b; } int main() { int a; a = 39; cout << a << endl; cout << use1(a) << endl; cout << a << endl; int b; b = 39; cout << b << endl; cout << use2(b) << endl; cout << b << endl; cout << "_____________" << endl; int i1=10, i2=20; cout << add<int>(i1, i2) << endl; double j1 = 10.253; double j2 = 9.635; cout << add<double>(j1, j2) << endl; cout << "_____________" << endl; Test<int> test(12); test.printT(); getchar(); }