#include <stdio.h> 
#include <math.h> 
 
void main() 
{ 
  int a[16][16],i,j,n,k; 
  printf("Please input n(1~15,it must be odd.): "); 
  scanf("%d",&n); 
  while(!(n>=1&&n<=15) || n%2==0) 
  { 
    printf("The number is invalid.Please insert again:"); 
    scanf("%d",&n); 
  } 
  //初始化数组 
  for(i=0; i<=n; ++i)  
  { 
    for(j=0; j<=n; ++j)  
    { 
      a[i][j]=0; 
    } 
  } 
 
  j = n/2 + 1; 
  a[1][j] = 1; 
  i = 1; 
  for(k=2; k<=n*n; ++k) 
  { 
    i = i - 1;  
    j = j + 1; 
    if(i==0 && j==n+1) //行列都越界 
    { 
      i = i+2; 
      j = j-1; 
    } 
    else  
    { 
      if(i==0) //行越界 
      { 
        i = n; 
      } 
      if(j==n+1) //列越界 
      { 
        j = 1; 
      } 
    } 
 
    if(a[i][j]==0) //如果里面没数字  
    { 
      a[i][j] = k; 
    } 
    else //得到新的数值 
    { 
      i = i + 2; 
      j = j - 1; 
      a[i][j] = k; 
    } 
  } 
 
  for(i=1; i<=n; ++i) 
  { 
    for(j=1; j<=n; ++j) 
    { 
      printf("%3d", a[i][j]); 
    } 
    printf("\n"); 
  } 
} 

#include <iostream> 
#include <math.h> 
 
void main() 
{ 
  int a[16][16],i,j,n,k; 
  std::cout<<"Please input n(1~15,it must be odd.): "; 
  std::cin>>n; 
  while(!(n>=1&&n<=15) || n%2==0) 
  { 
    std::cout<<"The number is invalid.Please insert again:"; 
    std::cin>>n; 
  } 
  初始化数组 
  for(i=0; i<=n; ++i)  
  { 
    for(j=0; j<=n; ++j)  
    { 
      a[i][j]=0; 
    } 
  } 
 
  i = 0; 
  j = n/2; 
  a[i][j] = 1; 
  for(k=2; k<=n*n; ++k) 
  { 
    i = i - 1;  
    j = j + 1; 
    if(i<=-1 && j>=n) //行列都越界 
    { 
      i = 1; 
      j = n - 1; 
    } 
    else  
    { 
      if( i<=-1 ) //行越界 
      { 
        i = n - 1; 
      } 
      if(j>=n) //列越界 
      { 
        j = 0; 
      } 
    } 
 
    if(a[i][j]==0) //如果里面没数字  
    { 
      a[i][j] = k; 
    } 
    else //得到新的数值 
    { 
      i = i + 2; 
      j = j - 1; 
      a[i][j] = k; 
    } 
  } 
 
  for(i=0; i<=n-1; ++i) 
  { 
    for(j=0; j<=n-1; ++j) 
    { 
      printf("%3d", a[i][j]); 
    } 
    printf("\n"); 
  } 
}