C++:in namespace 'std' does not name a template type

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對於類的聲明的標頭檔，對於include它的任何一個檔案，都需要將這個類內部聲明的成員需要的標頭檔include進去。代碼如下：

// hehe.h#ifndef HEHE_H#define HEHE_Hclass Hehe{public:    Hehe() = default;    void ShowSomthing();    // do somthing private:    std::vector<double> vec;};#endif  

　　// hehe.cpp　　#include <iostream>　　#include "hehe.h"　　void Hehe::ShowSomthing(){   　　 std::cout << __func__ << std::endl;　　}　　// do somthing

// main.cpp#include <iostream>#include "hehe.h"using namespace std;    int main(){    Hehe h;    h.ShowSomething();    return 0;}

 

進行編譯，將會報出錯

In file included from hehe.cpp:2:0:hehe.h:9:7: error: ‘vector‘ in namespace ‘std‘ does not name a template type  std::vector<double> vec;       ^~~~~~In file included from main.cpp:2:0:hehe.h:9:7: error: ‘vector‘ in namespace ‘std‘ does not name a template type  std::vector<double> vec;       ^~~~~~main.cpp: In function ‘int main()‘:main.cpp:6:5: error: ‘class Hehe‘ has no member named ‘ShowSomething‘; did you mean ‘ShowSomthing‘?   h.ShowSomething();     ^~~~~~~~~~~~~     ShowSomthing

之後，對於main.cpp添加#include ,通過

// main.cpp#include <iostream>#include <vector>#include "hehe.h"using namespace std;int main(){    Hehe h;    h.ShowSomething();    return 0;}

 

C++:in namespace 'std' does not name a template type