标签:style io ar color sp on as line size
Determine whether an integer is a palindrome. Do this without extra space.
思路:想办法把第一个和最后一个数字剥离出来比较
#include<stdio.h>
int isPalindrome(int x){
int d=x/10,i=1;
int begin=0,end=0;
if(x<0) return 0;
if(x/10==0) return 1;
while(d!=0){
d=d/10;
i=i*10;
}
d=x;
while(i!=0){
begin=d/i;
end=d%10;
//printf("%d,%d,%d,%d\n",begin,end,d,i);
if(begin!=end) return 0;
d=(d%i)/10;
i=i/100;
}
return 1;
}
void main(){
printf("%d\n",isPalindrome(5225));
}标签:style io ar color sp on as line size
原文地址:http://blog.csdn.net/uj_mosquito/article/details/41945061