http://coolshell.cn/?s=setjmp

http://www.cnblogs.com/hazir/p/c_setjmp_longjmp.html

1 double divide(double to, double by, jmp_buf env) 2 { 3     if(by == 0) 4         if (env) 5             longjmp(env, 1); 6         else 7             return 0; 8     else 9         return to/by;10 }11 12 void f()13 {14     jmp_buf env;15     int ret = setjmp(env);16     printf("jmp: %d\n", ret);17     if(ret == 0)18     {19         printf("result: %lf\n", divide(2.0, 0, env));20     }21     else22     {23         printf("error: %d\n", ret);24     }25 }