一个不知如何解决的循环问题

Question

放到一个数组str中
int i=0;
string a1,a2;
while(true){
  if (i>4){
     i=0;
  }
  a1=str[i]
  if (i+1>4){
     i=-1;
  }
  a2=str[i+1];
  i=i+2;
  do sth with a1和a2
}

Answer 1

要写一个方法处理，否则会出现死循环
class xx
{
int count;
String[] yy;
String[] str[]=("a","b","c","d");
public void xx()
{
  for(int i=0;i<2;i++
{
  if(count=5)
    count=1;
  yy[i]=str[count-1];
 }
}
}

Answer 2

String[] str[]=("a","b","c","d");
应为String[] str={"a","b","c","d"};

Answer 3

class xx{
string[] str={"a","b","c","d"};
string a1,a2;
int count=0;
while(ture)
  { if(count>4) count=0;
    a1=str[count];
    count++;
    if(count>4) count=0;
    a2=str[count];
    count++;
    //do sth with a1 and a2.
   }
}