Programming to print a diamond

#include<stdio.h>
#include<stdlib.h>
intmain()
{
	int line = 0;
	int i = 0;
	scanf("%d",&line);
	for(i=0;i<line;i++)//Print the upper part
	{
		int j = 0;
	   for(j=0;j<line-1-i;j++)//Print spaces
	   {
	   printf(" ");
	   }
	   for(j=0;j<2*i+1;j++)//打印*
	   {
	   printf("*");
	   }
	   printf("\n");
	}
   for(i=0;i<line-1;i++)//Print the second half
  {
	  int j = 0;
	  for(j = 0;j<=i;j++)//print spaces
	  {
		  printf(" ");
	  }
	  for(j = 0;j<2*(line-1-i)-1;j++)//打印*
	  {
	  printf("*");
      }
	  printf("\n");
  }
  system("pause");
  return 0;
}

operation result