This may sound easy and it probably is, I just started learning C++.
I have a class that writes to a file and I would like to add a second
optional parameter that will be used to tell the class if a newline
character should be written so the next output will start on a new line.
My class looks like this:
class Debug {
public:
Debug();
void Open(string);
void Write(string,bo ol);
void Write(float,boo l);
void Write(int,bool) ;
void Write(double,bo ol);
void Write(char,bool );
~Debug();
private:
ofstream outDebug;
};
And my definition of one of these looks like this:
void Debug::Write(st ring sDebug, bool bNewLine = true) {
if(bNewLine) {
outDebug << sDebug << endl;
} else {
outDebug << sDebug;
}
}
I want to set it up so that by default, it will write a new line, but it can
be overridden by sending a 'false' as the second parameter. However, I am
getting a "Write: no overloaded function takes 1 parameters" error when I
try to compile. The call looks like this:
DebugFile.Write ("Debug File Opened");
I could write it like this, DebugFile.Write ("Debug File Opened",true), but
since true is the default and the mode I will use 90% of the time, I was
hoping to be able to default to true so my calls will be shorter.
Any ideas?
Thanks in advance
John 2 9507
"Programmer " <js******@jsjho ldings.com> wrote... This may sound easy and it probably is, I just started learning C++.
I have a class that writes to a file and I would like to add a second optional parameter that will be used to tell the class if a newline character should be written so the next output will start on a new line.
My class looks like this: class Debug { public: Debug(); void Open(string); void Write(string,bo ol);
Change this to
void Write(string, bool = true);
void Write(float,boo l); void Write(int,bool) ; void Write(double,bo ol); void Write(char,bool ); ~Debug();
private: ofstream outDebug; };
And my definition of one of these looks like this: void Debug::Write(st ring sDebug, bool bNewLine = true) {
The default argument values should be used in the declaration,
not the definition. Remove it from here. Leave this as
void Debug::Write(st ring sDebug, bool bNewLine) {
.. Also, passing a string by value is inefficient. Passing it by
a reference to const is better. if(bNewLine) { outDebug << sDebug << endl; } else { outDebug << sDebug; } }
I want to set it up so that by default, it will write a new line, but it
can be overridden by sending a 'false' as the second parameter. However, I am getting a "Write: no overloaded function takes 1 parameters" error when I try to compile. The call looks like this:
DebugFile.Write ("Debug File Opened");
I could write it like this, DebugFile.Write ("Debug File Opened",true), but since true is the default and the mode I will use 90% of the time, I was hoping to be able to default to true so my calls will be shorter.
Any ideas?
See above.
Victor
"Victor Bazarov" <v.********@att Abi.com> wrote in message
news:K0C0b.2040 68$Ho3.27244@sc crnsc03... "Programmer " <js******@jsjho ldings.com> wrote... And my definition of one of these looks like this: void Debug::Write(st ring sDebug, bool bNewLine = true) {
The default argument values should be used in the declaration, not the definition. Remove it from here. Leave this as
void Debug::Write(st ring sDebug, bool bNewLine) {
. Also, passing a string by value is inefficient. Passing it by a reference to const is better.
if(bNewLine) { outDebug << sDebug << endl; } else { outDebug << sDebug; } }
I want to set it up so that by default, it will write a new line, but it
can be overridden by sending a 'false' as the second parameter. However, I
am getting a "Write: no overloaded function takes 1 parameters" error when
I try to compile. The call looks like this:
DebugFile.Write ("Debug File Opened");
I could write it like this, DebugFile.Write ("Debug File Opened",true),
but since true is the default and the mode I will use 90% of the time, I was hoping to be able to default to true so my calls will be shorter.
Any ideas?
See above.
Victor
I should also add:
void Write(const char *,bool=true);
in order to handle quoted strings so that you don't have to construct a
temporary string.
-al sung
Rapid Realm Technology, Inc.
Hopkinton, MA This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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