错误C244'{'：缺少函数标头（旧式的正式列表？）Visual C ++

Question

I've been looking at a lot of questions similar to mine but all of the answers are about how something is just wrong in the code. So I've been looking in mine and I can't find anything wrong with it. Though I guess it makes sense since I'm just starting out with C++. Here is the code:

#include <windows.h>
#include <conio.h>

int Main = MessageBox(NULL, "Testing", "Testing", MB_YESNO);
{
if (Main == IDYES) {
    MessageBox(NULL, "Testing2", "Testing", NULL)

    break;
}
else if (Main == IDNO) {
    MessageBox(NULL, "Testing3", "Testing", NULL)

    break;
}

return 0;
}

Answer 1

Your program needs to define a function called main . The main function is what gets called by the environment when your program starts running.

( main and Main are distinct identifiers, but I suggest that using the name Main for an object could be confusing.)

The definition of the main function should look like this:

int main() {
    // code goes here
}

The #include directives are fine where they are, but everything else should be inside the definition of main .

More complex structures are possible (for example you can have file-scope declarations and multiple function definitions), but this should get you started.

Answer 2

Your code should like something like this:

#include <windows.h>
#include <conio.h>

int main(){

 int result = MessageBox(NULL, "Testing", "Testing", MB_YESNO);

 if (result == IDYES){
  MessageBox(NULL, "Testing2", "Testing", NULL)
 }
 else if (result == IDNO){
  MessageBox(NULL, "Testing3", "Testing", NULL)
 }

 return 0;
}