//mystring.h
class MyString{
public:
std::string MyString(string, string);
private:
std::string theString
}
std::string MyString::Concat(std::string para_one, std::string para_two){
theString=para_one;
theString+=para_two;
return theString;
}
//main.cpp
main(){
hello=&MyString("fooz","baz");
}
std::string ReturnAnswer(){
return "abc"
}
int ReturnAnswer(){
return 123;
}
void Calculate(int somenumb){
return somenumb*2
}
int main(){
Calculate(ReturnAnswer());
}
void foo(char *);const char *x;foo(x); // I believe this causes the problem// error C2664: 'foo' : cannot convert parameter 1 from 'const char *' to 'char *'new_shenu.cpp: In function 'int main(int, char**)':new_shenu.cpp:97: error: no matching function for call to 'Skin::Display(std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<const std::string, std::string> > >)'Skin.h:127: note: candidates are: void Skin::Display()Skin.h:128: note: void Skin::Display(std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<const std::string, std::string> > >&)new_shenu.cpp:123: error: no matching function for call to 'Skin::Display(std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<const std::string, std::string> > >)'Skin.h:127: note: candidates are: void Skin::Display()Skin.h:128: note: void Skin::Display(std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<const std::string, std::string> > >&)*** Error code 1//mainData is a Config type.std::map <std::string, std::string> Config::Get(){ return config;}//and config is a mapstd::map <std::string, std::string> config;//new_shenu.cpp:97skin.Display( mainData.Get() );//Skin.h:127void Display();//Skin.h:128void Display(std::map<std::string, std::string>& para_skinData);//mainData is a Config type.std::map <std::string, std::string> Config::Get(){return config;}//and config is a mapstd::map <std::string, std::string> config;//new_shenu.cpp:97skin.Display( mainData.Get() );//Skin.h:127void Display();//Skin.h:128void Display( const std::map<std::string, std::string>& para_skinData);Skin.cpp: In member function 'void Skin::Display(const std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<const std::string, std::string> > >&)':Skin.cpp:958: error: no matching function for call to 'Skin::Read(const char [5], const std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<const std::string, std::string> > >&)'Skin.cpp:172: note: candidates are: void Skin::Read(std::string)Skin.cpp:186: note: void Skin::Read(std::string, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<const std::string, std::string> > >&)*** Error code 1void Skin::Display( const std::map<std::string, std::string>& para_skinData){ print::Instance().Header( "success" ); print::Instance().Body( "" ); Read("Head"); Read("Body", para_skinData); // this is 958 Read("Tail"); print::Instance().Tail( "" );}void Skin::Read( std::string para_loadKey, std::map<std::string, std::string>& para_skinData ){ skinData=NULL; skinData=¶_skinData; /* std::cout << &*skinData; for( loop=(*skinData).begin(); loop!=(*skinData).end(); loop++ ){ std::cout << loop->first << "=" << loop->second << "\n"; } */ if ( TestingMode ) std::cout << "**************Begin Skin::Read(std::string, std::map )****************\n\n"; Read( para_loadKey); if ( TestingMode ) std::cout << "**************End Skin::Read(std::string, std::map )****************\n\n";}Quote:Original post by Anonymous Poster
That's because foo() takes a char*. Make it take a const char* and all will be tickity-boo.
Quote:Original post by Antheusvoid foo(char *);const char *x;foo(x); // I believe this causes the problem// error C2664: 'foo' : cannot convert parameter 1 from 'const char *' to 'char *'
Or is it something else?
Quote:Original post by Tradone
that's the thing there's so many things that depend on that method that is causing the problem. I need to fix so many things... if I do decide to make that one thing into a const. So I want to know why and when pointers and references when passed through functions are required to change to consts and such...
