int main()
{
	int a = 0;
	int b = 2;
	1.if (a == 1)
		2.if (b == 2)
		
			printf("hehe\n");
		
		else
			printf("haha\n");//if else 算一条语句；

	return 0;
}
else 为是2.if的分支
如果else 想和1.if匹配 代码改为
int main()
{
	int a = 0;
	int b = 2;
	1.if (a == 1){
		2.if (b == 2)
			printf("hehe\n");
            }
	else
	      printf("haha\n");

	return 0;
}