长跳转函数应用

#include<string.h>
#include<stdio.h>
#include<setjmp.h>

static jmp_buf buf;
void process()
{
	char input[10];
	printf("==== In process ====\n");
	scanf("%s",&input);
	printf("input is %s \n",input);
	getchar();
	if(0==strcmp(input,"redo"))
		longjmp(buf,1);
	else if(0==strcmp(input,"exit"))
	{
		printf("In process: need exit with error \n");
		longjmp(buf,2);
	}
	else
		printf("In process: normal \n");
}
int main()
{
	while(1)
	{
		switch (setjmp(buf))
		{
		case 0:process();
			printf("0: main normal return\n");
			return 0;
		case 1:
			printf("1: process re do\n");
			break;
		case 2:printf("2:main return with error\n");
			return -2;
		default:
			printf("error default\n");
			return -1;
		}
	}
	return 0;
}/*redonormalexit*/

#include#include#includestatic jmp_buf buf;void process(){char input[10];printf("==== In process ====\n");scanf("%s",&input);printf("input is %s \n",input);getchar();if(0==strcmp(input,"redo"))longjmp(buf,1);else if(0==strcmp(input,"exit")){printf("In process: need exit with error \n");longjmp(buf,2);}elseprintf("In process: normal \n");}int main(){while(1){switch (setjmp(buf)){case 0:process();printf("0: main normal return\n");return 0;case 1:printf("1: process re do\n");break;case 2:printf("2:main return with error\n");return -2;default:printf("error default\n");return -1;}}return 0;}/*redonormalexit*/不好意思之前不知怎么代码乱了现在改好了