题解 | #箭形图案#

#include <stdio.h>

int main() { int x = 0; int i = 0; int j = 0;

while (scanf("%d", &x) != EOF)
{
    for (i=0; i<2*x+1; i++)
    {
        if (i == x)
            goto there;
        if (i > x)
        {
            for (j=0; j<i-x; j++)
                printf("  ");
            for (j=0; j<2*x-i+1;j++)
                printf("*");
            printf("\n");
            continue;
        }
        for (j=0; j<x-i; j++)
            printf("  ");
        there :
        for (j=0; j<i+1; j++)
            printf("*");
        printf("\n");
    }
    
}
return 0;

}