import java.util.Scanner;
public class A {
public static void main(String[] args) {
System.out.print("请输入行数(奇数):");
Scanner input=new Scanner(System.in);
int n=input.nextInt();
int s=n/2+1;
//上半部分
for(int i=1;i<=s;i++){//行数
for(int j=1;j<=s-i;j++){
System.out.print(" ");
}
for(int k=1;k<=2*i-1;k++){
if(k==1||k==2*i-1){
System.out.print("*");
}else{
System.out.print(" ");
}
}
System.out.println();
}
//下半部分
for(int u=1;u<=s-1;u++){
for(int m=1;m<=u;m++){
System.out.print(" ");
}
for(int o=1;o<=n-2*u;o++){
if(o==1||o==n-2*u){
System.out.print("*");
}else{
System.out.print(" ");
}
}
System.out.println();
}
}
}
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