打印菱形

#include <stdio.h>
#include <stdlib.h>
int main()
{
int line = 0;
printf("请输入一个数字：\n");
scanf("%d",&line);
int i = 0;
int j = 0;
for (i = 0; i < line; i++)
{
for (j = 0; j < line - i-1; j++)
{
printf(" ");
}
for (j = 0; j < 2*i + 1; j++)
{
printf("*");
}
printf("\n");

}
for (i = 0; i < line-1; i++)
{
for (j = 0; j < i + 1; j++)
{
printf(" ");
}
for (j = 0; j < 2*(line-1)- (2*i+1); j++)
{
printf("*");
}
printf("\n");

}
system("pause");
return 0;
}