For clearly, please view my sample
I have two files: main.cpp and myfunction.h
This is main.cpp
#include <setjmp.h>
#include <myfunction.h>
int main()
{
if ( ! setjmp(bufJum) ) {
printf("1");
func();
} else {
printf("2");
}
return 0;
}
This is myfunction.h
#include <setjmp.h>
static jmp_buf bufJum;
int func(){
longjum(bufJum, 1);
}
Now, I want my screen print "1" and then print "2", but this code is uncorrect! Please, help me! Thank you so much!
If you want to have it in multiple files, then you need to create two source files, not a single source file and a header file
myfunction.cpp:
#include <setjmp.h>
extern jmp_buf bufJum; // Note: `extern` to tell the compiler it's defined in another file
void func()
{
longjmp(bufJum, 1);
}
main.cpp:
#include <iostream>
#include <setjmp.h>
jmp_buf bufJum; // Note: no `static`
void func(); // Function prototype, so the compiler know about it
int main()
{
if (setjmp(bufJum) == 0)
{
std::cout << "1\n";
func();
}
else
{
std::cout << "2\n";
}
return 0;
}
If you are using GCC to compile these files, you can e.g. use this command line:
$ g++ -Wall main.cpp myfunction.cpp -o myprogram
Now you have an executable program called myprogram which is made from two files.
I don't know anything about setjmp, but you have at least one mistake in your code:
-#include <myfunction.h>
+#include "myfunction.h"
You have a non-inline function defined in a .h file. While not illegal, this is pretty much always wrong.
You have a static global variable defined in a .h file. While not illegal, this is pretty much always wrong.
