HDU 1039 -Easier Done Than Said?

 1 #include <iostream>
 2 #include <cstring>
 3 using namespace std;
 4 char s[1000];
 5 bool flag;
 6 int vol,v2,con;
 7 int main()
 8 {
 9     while(cin>>s)
10     {
11         if(!strcmp(s,"end")) break;
12         flag=1;
13         v2=vol=con=0;
14         for(int i=0;s[i]!=‘\0‘;i++)
15         {
16             if(s[i]==s[i+1]&&(s[i]!=‘e‘&&s[i]!=‘o‘)){
17                 flag=0; break;
18             }
19             if(s[i]==‘a‘||s[i]==‘e‘||s[i]==‘i‘||s[i]==‘o‘||s[i]==‘u‘) con=0,vol++,v2++;
20             else vol=0,con++;
21             if(vol==3||con==3){
22                 flag=0;    break;
23             }
24         }
25         if(v2<1) flag=0;
26         if(flag) printf("<%s> is acceptable.\n",s);
27         else printf("<%s> is not acceptable.\n",s);
28         
29     }
30 }