参考代码实现：

#include<stdio.h>      
#include<conio.h>      
main()      
{      
    int n, reverse=0, rem;    //declaration of variables.  
    clrscr(); // It clears the screen.     
    printf("Enter a number: ");      
    scanf("%d", &n);      
    while(n!=0)      
    {      
         rem=n%10;      
         reverse=reverse*10+rem;      
         n/=10;      
    }      
    printf("Reversed Number: %d",reverse);      
    getch();  // It reads a character from the keyword.    
}