Printing a square of stars without the Diagonals in C

Writing a program to print a square of stars without the diagonals was a lengthy process; me, being the cavalier programmer. ;)

This program can easily be done without using the matrix. It's just that I like matrices.

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#include<stdio.h>

#include<conio.h>

#define MAX 100

int main();

{

int i,j,m,sum=0,arr[MAX][MAX];

printf("Enter the dimensions of the square you want to print: \n");

scanf("%d",&m);

clrscr();

for(i=0;i<m;i++)

{

for(j=0;j<m;j++)

{

sum=i+j;

if(i!=j)

{

if(sum==m-1)

{

arr[i][j]==32;

printf("%c ",arr[i][j]);

}

else

{

arr[i][j]==42;

printf("%c ",arr[i][j]);

}

}

else if(i==j)

{

arr[i][j]==32;

}

}

printf("\n");

}

getch();

return 0;

}