C Exercise Example 30 - Palindrome Number
Title:A 5-digit number, determine whether it is a palindrome. That is, 12321 is a palindrome, the units digit is the same as the ten-thousands digit, and the tens digit is the same as the thousands digit.
Program analysis:Learn to decompose each digit.
Program source code:
Example
// Created by www.example.com on 15/11/9.
// Copyright © 2015 Example. All rights reserved.
//
#include <stdio.h>
int main( )
{
long ge,shi,qian,wan,x;
printf("Please enter a 5-digit number:");
scanf("%ld",&x);
wan=x/10000; /*Extract the ten-thousands digit*/
qian=x%10000/1000; /*Extract the thousands digit*/
shi=x%100/10; /*Extract the tens digit*/
ge=x%10; /*Extract the ones digit*/
if (ge==wan&&shi==qian) { /*The ones digit equals the ten-thousands digit and the tens digit equals the thousands digit*/
printf("This is a palindrome number\n");
} else {
printf("This is not a palindrome number\n");
}
}
The output result of the above example is:
请输入 5 位数字：12321 这是回文数 请输入 5 位数字：12345 这不是回文数other extensions