大家邦手睇下这段代码 请教下问题出在哪里。

[kpman]

#include <stdio.h>
#include <stdlib.h>

class Sample
{

public:
bool RunApp(int argc,char *argv[]);

Sample();

~Sample();
};

bool Sample::RunApp(int argc,char *argv[])
{
printf ("%s\n", "Entry....");

}

int main(int argc,char *argv[])
{
if (argc != 2)
{
printf(" test inputfile \n");
}


Sample App;

App.RunApp( argc, argv);


return 0;
}

编译出错信息如下：
Unsatisfied symbols:
Sample::Sample()(code)
Sample::~Sample()(code)
__gxx_personality_sj0 (code)
collect2: ld returned 1 exit status

[brookmill]

构造函数和析构函数，声明了但是没定义

[CXBID]

Sample();
~Sample(); 没有写实现!

[lbh2001]

#include <stdio.h> ---> #include <iostream.h>

[brookmill]

还有，RunApp是bool类型，但是没有返回值

[lbh2001]

将你的构造和析构函数删除，让编译器为你自动生成，反正你的类里没成员

#include <iostream.h>
#include <stdio.h> 

class Sample 
{ 

        public: 
                bool RunApp(int argc,char *argv[]); 
}; 

bool Sample::RunApp(int argc,char *argv[]) 
{ 
        printf ("%s\n",  "Entry....");
        return true;

} 

int main(int argc,char *argv[]) 
{ 
        if (argc != 2) 
        { 
           printf(" test  inputfile \n");
           return -1;
        } 


        Sample App; 

        App.RunApp( argc, argv); 


        return 0; 
} 

[normallife]

顶一下

[china_west]

#include<iostream>