打印正三角倒三角

#include<stdio.h>
#include<stdlib.h>
int main()
{
	int line = 0;
	int i = 0;
	scanf("%d", &line);
	for (i = 0; i < line; i++)
	{
		int j = 0;
		for (j = 0; j < line - 1 - i; j++)
		{
			printf(" ");//打印空格
		}
		for (j = 0; j < 2 * i + 1; j++)
		{
			printf("*");//打印*号
		printf("\n");
	}
	for (i = 0; i < line - 1; i++)
	{
		int j = 0;
		for (j = 0; j <=i; j++)
		{
			printf(" ");
		}
		for (j = 0; j < 2 * (line - 1 - i) - 1; j++)
		{
			printf("*");
		}
		printf("\n");
	}
	system("pause");
	return 0;
}