相当于 while(p!=q&&q-p!=1&&*p==*q)
{ p++;
q--;
}

main()
{char a[20];
char *q,*p;
printf("input the string:");
gets(a);
p=a;
q=a+strlen(a)-1;
while(p!=q&&q-p!=1&&*p++==*q--);
if(p==q||q-p==1)printf("hui wen\n");
else printf("bu shi huiwen\n");
getch();
}

运行成功!!!!!
向各位无私奉献自己知识的高手敬礼~~~~~
C:\Documents and Settings\zsl\桌面\0.cpp(9) : error C2065: 'strlen' : undeclared identifier
C:\Documents and Settings\zsl\桌面\0.cpp(13) : error C2065: 'getch' : undeclared identifier
C:\Documents and Settings\zsl\桌面\0.cpp(14) : warning C4508: 'main' : function should return a value; 'void' return type assumed
Error executing cl.exe.

有问题拉 不对哟
输入进去都是回文哟

#include<stdio.h>
#include<string.h>
main()
{
char a[20];
char *q,*p;
printf("input the string:");
gets(a);
p=a;
q=a+strlen(a)-1;
while(p!=q&&q-p!=1&&*p++==*q--);
if(p==q||q-p==0)
printf("hui wen\n");
else
printf("bu shi huiwen\n");
getchar();
return 0;
}
完成

q=a+strlen(a)-1;
while(p!=q&&q-p!=1&&*p++==*q--);[CODE][/CODE]
这两句不太懂,能解释一下吗