C Exercise Examples 30-- palindrome
100 cases of classic C language
Title: a 5-digit, determine if it is a palindrome. That 12321 is a palindrome, the same bits and ten thousand, ten and one thousand identical.
Program analysis: learn decompose each digit.
Source Code:
// Created by www.w3big.com on 15/11/9.
// Copyright © 2015年 本教程. All rights reserved.
//
#include <stdio.h>
int main( )
{
long ge,shi,qian,wan,x;
printf("请输入 5 位数字：");
scanf("%ld",&x);
wan=x/10000; /*分解出万位*/
qian=x%10000/1000; /*分解出千位*/
shi=x%100/10; /*分解出十位*/
ge=x%10; /*分解出个位*/
if (ge==wan&&shi==qian) { /*个位等于万位并且十位等于千位*/
printf("这是回文数\n");
} else {
printf("这不是回文数\n");
}
}
The above example output 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