Implement try-catch exception in C

try-catch.c

#include <stdlib.h>
#include <stdio.h>
#include <setjmp.h>
 
jmp_buf __exception_context;
 
#define try if(!setjmp(__exception_context))
#define catch else
#define throw_exception longjmp(__exception_context, 1)
 
void foo(void) {
  puts("in foo");
  throw_exception;
}
 
int main(int argc, char* argv[]) {
  try {
    puts("you can see this");
    foo();
    puts("never see this");
  } catch {
    puts("catch an exception");
  }
 
  puts("final");
 
  return EXIT_SUCCESS;
}