beginner c++ programmer compile errors

Hi, I am very new to C++ and am trying to get a very small example to work on building a very simple class. The code is as below:

Code:

---

#include <stdio.h>

class MyClass{
public: 
  void setNum(int num)
  {
      number = num;
  }
 
  int getNum()
  {
      return number;
  }
private:
  int number;
};

int main()
{
        MyClass tmp;
       
        tmp.setNum(3);
               
        printf("Your number is %d\n", tmp.getNum());
        return 0;               
}

---

I try to compile this code using the following command:

Quote:

---

gcc -o tmp tmp.cpp

---

and I get the following compiler error messages:

Quote:

---

Undefined first referenced
symbol in file
__gxx_personality_v0 /var/tmp/cc2h4zeU.o
ld: fatal: Symbol referencing errors. No output written to tmp
collect2: ld returned 1 exit status

---

However if I compile the above code without the bold line (i.e the following):

Code:

---

#include <stdio.h>

class MyClass{
public: 
  void setNum(int num)
  {
      number = num;
  }
 
  int getNum()
  {
      return number;
  }
private:
  int number;
};

int main()
{
        MyClass tmp;       
       
               
        //printf("Your number is %d\n", tmp.getNum());
        return 0;               
}

---

It compiles fine. Its seems to give the above error as soon as I try to use any instance of MyClass.

This may be a trivial problem but I would be grateful for any help.

Thanks.

#include <cstdio>

Use g++ for compiling C++ files, not gcc.


>> #include <cstdio>
#include <stdio.h> should work fine, although for C++ I'd use <iostream> and cout. Besides, this is a linking error, not a compiling error.

I have already tried that and I get the same error, actually my current version of the code does have the cstdio not the stdio, as I said it compiles when I don't do anything to the instance of MyClass but as soon as I try to do anything, I get the error.

Thanks Daved, I used g++ to compile it and it worked fine.