输入奇数 产出奇数阶的幻方，但是我的程序运行之后总是出错 望大家解答一下

#include <stdio.h>
int main(void)
{
int m,l,p,n,i,j;
printf("This program creates a magic square of a specified size.\n");
printf("The size must be an odd number between 1 and 99.\n");
printf("Enter size of magic square: ");
scanf("%d",&n);
int a[n][n];
for (i=0;i<n;i++){
for (j=0;j<n;j++)
a[i][j]=0;
}
l=n / 2;
a[0][l]=1;
m=n * n;
for (i=n-1;1;i--){
if (i==-1)
i=n - 1;
for (j=l+1;1;j++){
if (j==n)
j=0;
for (p=2;p<=m;p++){
if (a[i][j]==0){
a[i][j]=p;
}
else{
i=i + 2;
j=j - 1;
a[i][j]=p;
}
}
}
}
for (i=0;i<n;i++){
for (j=0;j<=n;j++){
if (j==n)
printf("\n");
else
printf("%d",a[i][j]);
}
}
return 0;
}