当禁用for时……

#include<cstdio>
int main(){
    int n;
    scanf("%d",&n);
    switch(n){
        case 1:printf("*");break;
        case 2:printf("**\n **");break;
        case 3:printf("***\n ***\n  ***");break;
        case 4:printf("****\n ****\n  ****\n   ****");break;
        case 5:printf("*****\n *****\n  *****\n   *****\n    *****");break;
        case 6:printf("******\n ******\n  ******\n   ******\n    ******\n     ******");break;
        case 7:printf("*******\n *******\n  *******\n   *******\n    *******\n     *******\n      *******");break;
        case 8:printf("********\n ********\n  ********\n   ********\n    ********\n     ********\n      ********\n       ********");break;
        case 9:printf("*********\n *********\n  *********\n   *********\n    *********\n     *********\n      *********\n       *********\n        *********");break;
        default:return 2147483647;
    }
}