Program to display dimond shape triangle in C Programming

#include 
#include 
void main(){
     int i,j,k,m,num,c;
     clrscr();
     printf("*****Logical Square*****\n");
     printf("Enter number of lines u want : ");
     scanf("%d",&num);
     printf("\n\n");
//for top partfor(i=1;i<=num;i++)
{
     c=num;
     for(j=1;j<=(num-i)+2;j++)
        putchar(' ');
     for(k=1;k<=i;k++)
        printf("%d",c--);
     c++;
     for(m=c;m<=num;m++)
{
        printf("%d",++c);
     }
     printf("\n");
     }

//for bottom partfor(i=1;i<=num;i++)
{
     c=num;
     for(j=num;j>=(num-i);j--)
        putchar(' ');
     for(k=c;k>i;k--)
        printf("%d",k);
     for(m=k;m<=c;m++)
        printf("%d",m);
     printf("\n");
     }

getch();
}