C Program for O letter in the Center of Square of J

/*
output
J J J J J
J J J J J
J J 0 J J
J J J J J
J J J J J
*/
void main()
{
int i,j,k;
int r,c;
clrscr();
printf("Enter the Row and column size");
scanf("%d%d",&r,&c);
for(i=0;i<r;i++)
{
for(j=0;j<c;j++)
{
k=i*r+j+1;
if(k==((r*c)/2+1))
printf("O ");
else
printf("J ");
}
printf("\n");

}

getch();


}