本来是想编出程序是       1
                        121
                       12321
                      1234321
                     123454321
                      1234321
                       12321
                        121
                         1
这种图形，但最后图形却变了，求教一下这个程序错在哪里了








#include<stdio.h>
#define n 4
int main()
{
 int i,j;
    for(i=0;i<=n;i++)
 {
  for(j=1;j<=n-i;j++)
   printf(" ");
  for(j=1;j<=2*i+1;j++)
   printf("%d",j<=i+1?j:j-i-1);
  printf("\n");
 }
 for(i=n-1;i>=0;i--)
 {
  for(j=1;j<=n-i;j++)
   printf(" ");
  for(j=1;j<=2*i+1;j++)
   printf("%d",j<=i+1?j:j-i-1);
  printf("\n");
 }
}

printf("%d",j<=i+1?j:2*i+2-j);

printf("%d",j<=i+1?j:j-i-1)
//这里打错了，可以改成
printf("%d",j<=i+1?j:i+1-(j-i-1))

#include<stdio.h>
#include<math.h>
#define n 5
int main(){
    for(float i=-n-1;i<n;i++){
        for(float j=-n-1;j<n;j++)
        if(fabs(i+j)<n&&fabs(i-j)<n)
          if(i*j>0)printf("%.f",n-fabs(i+j));
          else printf("%.f",n-fabs(i-j));
        else printf(" ");
        printf("\n");
    } 
}