#include<stdio.h>
int n;
void draw(int n)
{
int i,j;
for (i=1-(n>>1);i<=n;i++)
if (i>=0)
{
for (j=0;j<i;j++) printf(" ");
for (j=1;j<=2*(n-i)+1;j++) printf(" *");
printf("\n");
}
else
{
for (j=i;j<0;j++) printf(" ");
for (j=1;j<=n+2*i+1;j++) printf(" *");
for (j=1;j<=-1-2*i;j++) printf(" ");
for (j=1;j<=n+2*i+1;j++) printf(" *");
printf("\n");
}
}
int main()
{
printf("Please input the size (n>=4):");
scanf("%d",&n);
draw(n);
return 0;
}
空心的：
#include<stdio.h>
int n;
void draw(int n)
{
int i,j;
for (i=1-(n>>1);i<=n;i++)
if (i>0)
{
for (j=0;j<i;j++) printf(" ");
for (j=1;j<=2*(n-i)+1;j++)
if (j==1||j==2*(n-i)+1) printf(" *");
else printf(" ");
printf("\n");
}
else
if (i==0)
{
printf(" *");
for (j=1;j<n;j++) printf(" ");
printf(" *");
for (j=1;j<n;j++) printf(" ");
printf(" *\n");
}
else
{
for (j=i;j<0;j++) printf(" ");
for (j=1;j<=n+2*i+1;j++)
if (i==1-(n>>1)) printf(" *");
else if (j==1||j==n+2*i+1) printf(" *");
else printf(" ");
for (j=1;j<=-1-2*i;j++) printf(" ");
for (j=1;j<=n+2*i+1;j++)
if (i==1-(n>>1)) printf(" *");
else if (j==1||j==n+2*i+1) printf(" *");
else printf(" ");
printf("\n");
}
}
int main()
{
printf("Please input the size (n>=4):");
scanf("%d",&n);
draw(n);
return 0;
}