题解 | 空心三角形图案

#include <stdio.h>

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