A.smart vlan
B.mux vlan
C.QINQ vlan
A.Smart though is he
B.Smart as is he
C.As he is smart
D.Smart as he is
#include<stdio.h>
main()
{char*a="12134211";
int v1=0,v2=0,v3=0,v4=0,k;
for(k=0;k<=strlen(a);k++)
switch(*a++)
{default:v4++;
case'1':v1++;
case'3':v3++;
case'2':v2++;)
printf("v1=%d,v2=%d,v3=%d,v4=%d\n",v1,v2,v3,v4);}