c program to print diamond pattern

#include<stdio.h>
 
main()
{
    int n, c, k, space = 1;
 
    printf("Enter number of rows\n");
    scanf("%d",&n);
 
    space = n - 1;
 
    for ( k = 1 ; k <= n ; k++ )
    {
        for ( c = 1 ; c <= space ; c++ )
            printf(" ");
 
        space--; 
 
        for ( c = 1 ; c <= 2*k-1 ; c++)
            printf("*");
 
        printf("\n");
 
    }
 
    space = 1;
 
    for ( k = 1 ; k <= n - 1 ; k++ )
    {
        for ( c = 1 ; c <= space; c++)
            printf(" ");
 
        space++;
 
        for ( c = 1 ; c <= 2*(n-k)-1 ; c++ )
            printf("*");
 
        printf("\n");
    }         
 
    return 0;
}

output

  *
 ***
*****
 ***
  *