3、【填空题】下列程序段 main() { int a; scanf(“%d”,&a); switch(a) { case 1:printf(“Monday\n”);break; case 2:printf(“Tuesday\n”);break; case 3:printf(“Wednesday\n”);break; case 4:printf(“Thursday\n”);break; case 5:printf(“Friday\n”);break; case 6:printf(“Saturday\n”);break; case 7:printf(“Sunday\n”);break; default:printf(“error!\n”); 通过键盘输入3后输出的结果是(_) 答案:第一空:Wednesday