C语言：int x=5,y=7,z; z=x>y?5>3?++x+y:x:++x-y++ 则z的值为________.

C语言：int x=5,y=7,z; z=x>y?5>3?++x+y:x:++x-y++ 则z的值为________.
C语言：int x=5,y=7,z; z=x>y?5>3?++x+y:x:++x-y++ 则z的值为________.

C语言：int x=5,y=7,z; z=x>y?5>3?++x+y:x:++x-y++ 则z的值为________.
int x=5,y=7,z;//x=5,y=7,z=?
z=x>y?5>3?++x+y:x:++x-y++;//此句分解为下面语句
if(x>y)//此条件不成立直接else
{
    if(5>3)
    {
      z=++x+y;
    }
    else
    {
        z=x;
    }
}
else//运行此句 
{
    z=++x-y++;
 }

上述问题转化为z=++x-y++;
++x的值为x+1
y++的值为y
则问题转化为z=(x+1)-y=6-7=-1

结果为-1