7-9 Three digits in reverse order (10 points)

The program reads a positive 3 digits each time, and then outputs the digits in reverse order. Note: When the input number contains a trailing 0, the output should not have a leading 0. For example, if you enter 700, the output should be 7.

Input format:
Each test is a 3-digit positive integer.

Output format:
output the number in bit reverse order.

Input sample:

123

Sample output:

321

#include<stdio.h>
int main (void)
{
    
    
	int a, b, c, d, e;
	scanf("%d",&a);
	b=a/100;
	c=a/10%10*10;
	d=a%10*100;
	e=b+c+d;
	printf("%d", e);
	return 0;
}