setjmp和longjmp

#include<stdio.h>

#include<setjmp.h>

 

jmp_bufjumper;

 

 

void Func1()

{

         longjmp(jumper,1);

}

 

void Func2()

{

         longjmp(jumper,2);

}

 

void Func3()

{

         longjmp(jumper,-1);

}

 

//错误处理模块

void SetExceptionHandler()

{

         switch ( setjmp(jumper) )

         {

                   case 0:

                            //第一次设置,正常

                            break;

                   case 1:

                            printf( "error 1\n");

                   break;

 

                   case 2:

                            printf( "error 2\n");

                   break;

 

                   default :

                            printf( "unknown error\n");

                   break;

         }

}

 

void main( void )

{

         SetExceptionHandler();

         

         Func1();

         Func2();

         Func3();

}

 输出:

error 1
error 2
unknown error