![](https://lstatic.shangxueba.com/jiandati/pc/images/pc_jdt_tittleico.png)
阅读下面程序:#include<iostream.h>fun(int a,int b){int c;c=a+b;return c;}void main(){int x=
阅读下面程序: #include<iostream.h> fun(int a,int b) { int c; c=a+b; return c; } void main() { int x=6,y=7,z=8,r; r=fun((x--,y++,x+y),z--); cout<<r<<endl; } 则该程序的输出结果是()。
A.11
B.20
C.21
D.31
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_panel_vip.png)