编写程序，它从标准输入读取c源代码，并验证所有的花括号都正确的成对出现

int  main()
{
	int ch = 0;
	int count = 0;
	while ((ch = getchar()) != EOF)//ctrl  z
	{
		if (ch == '{')
			count++;
		else if (ch == '}'&&count == 0)
		{
			printf("不匹配\n");
			return 0;
		}
		else if (ch == '}'&&count != 0)
		{
			count--;
		}
	}
	if (count == 0)
	{
		printf("匹配\n");
	}
	else
	{
		printf("不匹配\n");
	}

	system("pause");
	return 0;
}