View Code of Problem 53

#include <stdio.h>
int main()
{
	int n,i,j;
	scanf("%d", &n);
	for (i = 1; i <= n; i++)
	{
		for (j = 0; j < n - i; j++)
			printf(" ");
		for (j = 0; j < 2 * i - 1;j++)
			printf("*");
		printf("\n");
	}
	for (i = n - 1; i > 0; i--)
	{
		for (j = 0; j < n - i; j++)
			printf(" ");
		for (j = 0; j < 2 * i - 1; j++)
			printf("*");
		printf("\n");
	}
}