Magic Square Generation in 'C' Language with Example

 /*  
  Magic Square:-   
    It is a square matrix whose row element's addition and column element's   
    addition and diagonal element's addition is same.   
    Read more about Magic Square:- http://en.wikipedia.org/wiki/Magic_square  
 */  
 #include<stdio.h>  
 #define MAX 100  
 int main()  
 {  
       int sqr[MAX][MAX];  
       int i,j,p,q,n;  
       int cnt=1;  
      label:  
       printf("\nEnter matrix size:");  
      scanf("%d",&n);  
       if(n%2==0)  
       {  
            printf("\nPlease enter odd number.");  
            goto label;  
       }  
       for(i=0;i<n;i++)  
            for(j=0;j<n;j++)  
                 sqr[i][j]=0;  
       i=p=q=0;  
       j=(n-1)/2;  
       sqr[i][j]=cnt++;  
       do  
       {  
            if(i==0)  
                 p=n-1;  
            else  
                 p=i-1;  
            if(j==0)  
                 q=n-1;  
            else  
                 q=j-1;  
            if(sqr[p][q])  
            {  
                 p=i+1;  
                 q=j;  
                 sqr[p][q]=cnt++;  
            }  
            if(sqr[p][q] == 0)  
                 sqr[p][q]=cnt++;  
            i=p;  
            j=q;  
       }while(cnt != (n*n)+1);  
       printf("\nMagic Square is:\n");  
       for(i=0;i<n;i++)  
       {  
            for(j=0;j<n;j++)  
                 printf("\t%d",sqr[i][j]);  
            printf("\n");  
       }  
      return 0;  
 }