Error creating a class in C - c

Question

I've some error on this class construction,
cwrapper.h
#include "SimpleCLM.h"
using namespace std;
using namespace cv;
class A{
public:
A();
~A();
met1();
};
void *A_init();
A_m1(void *p);
cwrapper.c
#include "cwrapper.h"
using namespace std;
using namespace cv;
void *A_init()
{
A *p = new A;
return (void *)p;
}
A_m1(void *p)
{
return p->met1();
}
A::met1()
{
return begin();
}
begin is a function in SimpleCLM.h.
Here is the errors on make,
In file included from /home/samuel/Desktop/matlab_cpp/cwrapper.h:1,
from /home/samuel/Desktop/matlab_cpp/cwrapper.c:1:
/home/samuel/Desktop/matlab_cpp/SimpleCLM.h:2: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘begin’
In file included from /home/samuel/Desktop/matlab_cpp/cwrapper.c:1:
/home/samuel/Desktop/matlab_cpp/cwrapper.h:3: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘namespace’
/home/samuel/Desktop/matlab_cpp/cwrapper.h:4: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘namespace’
/home/samuel/Desktop/matlab_cpp/cwrapper.h:6: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘A’
/home/samuel/Desktop/matlab_cpp/cwrapper.h:14: warning: data definition has no type or storage class
/home/samuel/Desktop/matlab_cpp/cwrapper.c:3: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘namespace’
/home/samuel/Desktop/matlab_cpp/cwrapper.c:4: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘namespace’
/home/samuel/Desktop/matlab_cpp/cwrapper.c: In function ‘A_init’:
/home/samuel/Desktop/matlab_cpp/cwrapper.c:8: error: ‘A’ undeclared (first use in this function)
/home/samuel/Desktop/matlab_cpp/cwrapper.c:8: error: (Each undeclared identifier is reported only once
/home/samuel/Desktop/matlab_cpp/cwrapper.c:8: error: for each function it appears in.)
/home/samuel/Desktop/matlab_cpp/cwrapper.c:8: error: ‘p’ undeclared (first use in this function)
/home/samuel/Desktop/matlab_cpp/cwrapper.c:8: error: ‘new’ undeclared (first use in this function)
/home/samuel/Desktop/matlab_cpp/cwrapper.c:8: error: expected ‘;’ before ‘A’
/home/samuel/Desktop/matlab_cpp/cwrapper.c: In function ‘A_m1’:
/home/samuel/Desktop/matlab_cpp/cwrapper.c:14: warning: dereferencing ‘void *’ pointer
/home/samuel/Desktop/matlab_cpp/cwrapper.c:14: error: request for member ‘met1’ in something not a structure or union
/home/samuel/Desktop/matlab_cpp/cwrapper.c: At top level:
/home/samuel/Desktop/matlab_cpp/cwrapper.c:17: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘:’ token
make[2]: *** [CMakeFiles/cwrapper.dir/cwrapper.c.o] Error 1
make[1]: *** [CMakeFiles/cwrapper.dir/all] Error 2
make: *** [all] Error 2

Answer 1

It is impossible to create a class in C; you would have to tell the compiler somehow that you want to compile C++.