【咨询】求大神帮忙！

#include<stdio.h>
void main()
{
int a,b,c,e;
printf("please input three number\n");
scanf("%d%d%d\n",&a,&b,&c);
if (a > b)
{
e=a;
a=b;
b=e;
}
if (a > c)
{
e=c;
a=c;
c=e;
}
if (b > c)
{
e=b;
b=c;
c=e;
}
printf("%d%d%d",a,b,c);