Question

I am learning C++ and have a simple Date class where I am trying to set a value for the Date.

Here are the source code files –

Date.h

class Date{ 
private:
    int month;
    int day;
    int year;

public:
    Date();
    void setDate(int m, int d, int y);

};

and Date.cpp

#include "Date.h"

Date::Date()
{
    month = 1;
    day = 1;
    year = 80;

};

void Date :: setDate(int m1, int d1, int y1){
    month = m1;
    day = d1;
    year = y1;
};

However, when I compile the code, I get the error message –

    Undefined symbols for architecture x86_64:
  "_main", referenced from:
      start in crt1.10.6.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status

Can someone please help ?

Thanks

Answer 1

You’re missing a main function. Add this to either a new file (like main.cpp, and include it when compiling and linking) or to your other .cpp file.

int main(int argc, char *argv[]) {  }

And put your code to run the program in the braces.