Answer Posted / prakash

int main()
{
int i, j, star, space, n, middle;

printf("Enter the max. number of stars in a line:");
scanf("%d", &n);
printf("Output:\n");

star = n/2;
space = 1;
middle = n/2 + 1;

for (j = 1; j <= n; j++)
printf("*");
printf("\n");

for (i = 2; i <= (n - 1); i++)
{
for (j = 1; j <= n; j++)
{
if ((j >= (star + 1)) &&
(j <= (star + space)))
{
printf(" ");
}
else
{
printf("*");
}
}

// calculate a and b
if (i < middle)
{
star -= 1;
space += 2;
}
else
{
star += 1;
space -= 2;
}

printf("\n");
}

for (j = 1; j <=n; j++)
printf("*");
printf("\n");

return 0;
}

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