Definition of palindrome number and extension of use

Palindrome number

Definition: The same number as the read-back read, read from left to right and read from right to left is exactly the same natural number. For example: 91,11,202,1001 and so on, 1011 is not.

Topic 1: Enter two number l,r, Output x. where x satisfies the number of palindrome numbers within the [L,r] range.

1#include <iostream>2#include <stdio.h>3#include <math.h>4 5 using namespacestd;6 intHuiwen (intnum)7 {8     into = num;//O Store Positive order9     intTMP =0;Ten      while(num! =0)//tmp Store Reverse order One     { ATMP *=Ten; -TMP + = num%Ten; -Num/=Ten; the     } -     if(TMP = = O)//whether the normal sequence of palindrome number is quite to judge -     //if (tmp%10 = = o%10)//Single -digit judgment in reverse order -     { +         return 1; -     } +     return 0; A } at  - intMain () - { -     intL,r; -scanf"%d%d",&l,&R); -     intCount=0; in      for(inti=l;i<=r;i++) -     { to         if(Huiwen (i) = =1) count++; +     } -cout<<count<<Endl; the     return 0; *}

Expansion: Defines a special palindrome number, which requires only the first and the tail equal. Example: 8,11,202,1001,1011, etc.

Topic 2: Enter two number l,r, Output x. where x satisfies the number of palindrome numbers within the [L,r] range.

1#include <iostream>2#include <stdio.h>3#include <math.h>4 5 using namespacestd;6 intHuiwen (intnum)7 {8     into = num;//O Store Positive order9     intTMP =0;Ten      while(num! =0)//tmp Store Reverse order One     { ATMP *=Ten; -TMP + = num%Ten; -Num/=Ten; the     } -     //if (tmp = = O)//whether the normal sequence of palindrome number is quite to judge -     if(tmp%Ten= = o%Ten)//Single -digit judgment in reverse order -     { +         return 1; -     } +     return 0; A } at  - intMain () - { -     intL,r; -scanf"%d%d",&l,&R); -     intCount=0; in      for(inti=l;i<=r;i++) -     { to         if(Huiwen (i) = =1) count++; +     } -cout<<count<<Endl; the     return 0; *}

Definition of palindrome number and extension of use