C 语言实例 - 判断回文数
C 语言教程
· 2019-02-20 20:28:16
判断一个数是否为回文数。
设n是一任意自然数。若将n的各位数字反向排列所得自然数n1与n相等，则称n为一回文数。例如，若n=1234321，则称n为一回文数；但若n=1234567，则n不是回文数
实例
#include <stdio.h>
int main()
{
int n, reversedInteger = 0, remainder, originalInteger;
printf("输入一个整数: ");
scanf("%d", &n);
originalInteger = n;
// 翻转
while( n!=0 )
{
remainder = n%10;
reversedInteger = reversedInteger*10 + remainder;
n /= 10;
}
// 判断
if (originalInteger == reversedInteger)
printf("%d 是回文数。", originalInteger);
else
printf("%d 不是回文数。", originalInteger);
return 0;
}
运行结果：
输入一个整数: 12321 12321 是回文数
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