程式碼如下：import java.util.Scanner;public class ReverseNumber { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.println("請輸入一個整數："); int num = scanner.nextInt(); StringBuilder stringBuilder = new StringBuilder(); String reverseStr = stringBuilder.append(num).reverse().toString(); System.out.println(reverseStr); //如果想要整型，再轉換一次 int reverseNum = Integer.valueOf(reverseStr);// System.out.println(reverseNum); }}

#include

void main()

{

int n,s=0;

printf("請輸入一個整數：");

scanf("%d",&n);

while(n!=0)

{

s=s*10+n%10;

n/=10;

}

printf("%d",s);

}