#include <iostream>

1 Std::ref () Implementing a reference wrapper

2 std::string string

1 Std::ref () Implementing a reference wrapper

The template function reference is not valid, so you need to reference the wrapper

Std::ref (), the function template directly references

1#include <iostream>2 using namespacestd;3 4Template <classT>5 voidCOM (T Arg)//The template function reference is not valid, so you need to reference the wrapper6 {7arg++;8Std::cout <<"void COM (T arg)"<< &arg << Std::endl;//not the same address .9 }Ten  One voidMain () A { -     intCountTen); -     int& Rcount (count);//References the  -Std::cout <<"the original value"<< Count << Std::endl;//Ten -  -COM (&count);//parameter is address +  -Std::cout <<"parameter is address"<< Count << Std::endl;//still ten +  ACOM (rcount);//parameter is a reference at  -Std::cout <<"parameter is a reference"<< Count << Std::endl;//still ten -  -Std::cout <<"Main"<< &count << Std::endl;//not the same address . -  -     //std::ref (variable name), function template Direct reference inCOM (std::ref(count)); -  toStd::cout <<"Reference Wrapper"<< Count << Std::endl;//become One +  -System"Pause"); the}

2 std::string string

R "(You can remove the escape character inside the parentheses)"

1#include <iostream>2 3 voidMain ()4 {5     //R "(You can remove the escape character inside the parentheses)"6STD::stringPath = R"("D:\Program Files\tencent\qqintl\bin\qq.exe")";7 8System (PATH.C_STR ());//Execution9 TenSystem"Pause"); One}

#include <iostream>