题解 | #圣诞树#

#include<stdio.h>
void fun1(){
    printf("  *   ");
}
void fun2(){
    printf(" * *  ");
}
void fun3(){
    printf("* * * ");
}
void fun(){
    printf("   ");//输出3个空格
}
int main()
{
    int n,i,j,m;
    while(scanf("%d",&n)!=EOF){
        for(i=1;i<=3*n;i++){
            if(i%3==1){
                for(m=0;m<n-1-i/3;m++){
                    fun();
                }
                for(j=1;j<=i/3+1;j++){
                    fun1();
                }
                printf("\n");
            }
            if(i%3==2){
                for(m=0;m<n-1-i/3;m++){
                    fun();
                }
                for(j=1;j<=i/3+1;j++){
                    fun2();
                }
                printf("\n");
            }
            if(i%3==0){
                for(m=0;m<n-i/3;m++){
                    fun();
                }
                for(j=1;j<=i/3;j++){
                    fun3();
                }
                printf("\n");
            }
         }
        for(i=0;i<n;i++){
            for(j=0;j<3*n-1;j++){
                printf(" ");
            }
            printf("*\n");
        }
    }
    return 0;
}