运行一个关于螺旋矩阵的程序,但是当输入的矩阵阶数为奇数时,最中间的数字为0?这是为什么?
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
int i,j;
int n,number;
System.out.print("请输入矩阵的阶数n:");
Scanner s = new Scanner(System.in);
n=s.nextInt();
int[][] matrix = new int[n][n];
System.out.print("请输入矩阵初始的值number:");
number=s.nextInt();
Rmatrix(n,0,number,matrix);
for (i=0;i<n;i++){
for (j=0;j<n;j++){
System.out.printf("%5d" ,matrix[i][j]);
}
System.out.print("\n");
}
}
public static void Rmatrix(int n,int start,int number,int[][] m){
int i;
if(n<=1){
return;
}
else{
for (i=start;i<(n-1);i++){
m[i][start]=number;
number++;
}
for (i=start;i<(n-1);i++){
m[n-1][i]=number;
number++;
}
for(i=(n-1);i>start;i--){
m[i][n-1]=number;
number++;
}
for(i=(n-1);i>start;i--){
m[start][i]=number;
number++;
}
start++;
Rmatrix((n-1),start,number,m);
}
}
}
![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/26193955456617.png "#left")