int main() { int day; printf("请输入一个0-6之间的整数"); scanf("%d",&day); switch(day) { case 0:printf("Sunday\n"); case 1:printf("Monday\n"); case 2:printf("Tuesday\n"); case 3:printf("Wednesday\n"); case 4:printf("Thursday\n"); case 5:printf("Friday\n"); case 6:printf("Saturday\n"); default:printf("error\n"); } return 0; } 当输入4,回车时,输出的结果是:( )