打印一个空心菱形
代码块如下所示:
for (int i=1;i<=5;i++){
for (int j=1;j<=5-i;j++){
System.out.print(" ");
}
for (int j=1;j<=2*i-1;j++){
if (j==1||j==2*i-1){
System.out.print("*");
}else{
System.out.print(" ");
}
}
System.out.println();
}
for (int i=1;i<=4;i++){
for (int j=1;j<=i;j++){
System.out.print(" ");
}
for (int j=1;j<=9-2*i;j++){
if (j==1||j==9-2*i){
System.out.print("*");
}else{
System.out.print(" ");
}
}
System.out.println();
}
效果图如下: