题解 | #空心三角形图案#

#include <stdio.h>

int main() {
    int num = 0;;
    while (scanf("%d", &num) != EOF)
    { 
        for (int i = 0; i < num - 1; i++)
        {
            for (int j = 0; j <= i; j++)
            {
                if (j == 0 || j == i)
                {
                    printf("* ");
                }
                else 
                {
                    printf("  ");
                }
            }
            printf("\n");
        }

        for (int i = 0; i < num; i++)
        {
            printf("* ");
        }
        printf("\n");
    }
    return 0;
}