Re: gcc err : undefined reference to ?
key9 <iamkey9@126.com> wrote:
Hi all:
app error :
//main.cpp
...
char* q ;
*q = 'c';
q is a pointer to garbage, then you try to store a character in this
garbage, so you have undefined behavior here.
LinuxTestTerminal* lt = new LinuxTestTerminal();
lt->printch(q);
..
**********************************
//LinuxTestTerminal.h
#ifndef __LINUXTERMINAL_H_
#define __LINUXTERMINAL_H_
#include "Terminal.h"
class LinuxTestTerminal : public Terminal{
public:
void printch(char* ch );
// void printch(char ch);
void backSpace();
void printCR();
void printTab();
};
#endif // __LINUXTERMINAL_H_
gcc report: undefined reference to 'LinuxTestTerminal::printch(char*)
collect2: ld returned 1 exit status.
Do you have the source for LinuxTestTerminal.cpp? If so, look to make
sure that LinuxTestTerminal::printch(char*) has been implemented. If it
hasn't, then since you are deriving from another class, maybe something
along the lines of this issue is present:
http://www.parashift.com/c++-faq-lite/strange-inheritance.html#faq-23.9
--
Marcus Kwok
Replace 'invalid' with 'net' to reply
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