C中的goto，setjmp使用示例（异常的集中处理）

#include <stdio.h>#include <setjmp.h>jmp_buf j;int main(){    switch(setjmp(j))    {        case 0:              printf("this is main to do\n");              longjmp(j, 1);              printf("main is over\n");              break;        case 1:              printf("main is error 1\n");              break;        case 2:              printf("main is error 2\n");              break;        default:              break;    }    return 0;}

输出结果为

this is main to do
main is error 1