C库宏 setjmp()

#include <stdio.h>

#include <stdlib.h>

#include <setjmp.h>



int main () {

   int val;

   jmp_buf env_buffer;



   /* save calling environment for longjmp */

   val = setjmp(env_buffer );



   if( val != 0 ) {

      printf("Returned from a longjmp() with value = %s\n", val);

      exit(0);

   }



   printf("Jump function call\n");

   jmpfunction(env_buffer );



   return(0);

}



void jmpfunction(jmp_buf env_buf) {

   longjmp(env_buf, "codingdict.com");

}