C / C++ / MFC

<br />
std::string dateTime = "2000/10/31 12:00";<br />
std::string dateOnly = dateTime.substr(0, 10);<br />

Pssst. You see that little light on your monitor? That's actually a government installed spy camera. Smile and wave to big brother!

////////////////////////////////////
// cFunctions.h
 
#ifdef __cplusplus
extern "C" {
#endif
 
// Functions declared here can be used both
// in C and C++ code
 
int c_func_in_c_file(int someParm);
int c_func_in_c_file2();
 
#ifdef __cplusplus
}
#endif
 
 
////////////////////////////////////
// cFunctions.c
 
#include "cFunctions.h"
#include "cppFunctions.h"
 
int c_func_in_c_file(int someParm)
{
   return someParm + c_func_in_cpp_file();
}
 
int c_func_in_c_file2()
{
   return 42;
}
 
 
/////////////////////////////////////
// cppFunctions.h
 
#ifdef __cplusplus
extern "C"
{
#endif
 
// Functions declared here can be used both
// in C and C++ code
 
int c_func_in_cpp_file();
 
#ifdef __cplusplus
}
 
// Functions declared here can only be used
// in C++ code
 
int cpp_func_in_cpp_file();
 
#endif
 
 
/////////////////////////////////////
// cppFunctions.cpp
 
#include "cppFunctions.h"
#include "cFunctions.h"
 
extern "C" int c_func_in_cpp_file()
{
   return cpp_func_in_cpp_file() + c_func_in_c_file2();
}
 
int cpp_func_in_cpp_file()
{
   return c_func_in_c_file2();
}