abc sort

#include<stdio.h>
//从大到小
int main()
{
int a, b, c;
int x = 0;

printf("input message:\n");
scanf("%d %d %d", &a, &b, &c);

if(a < b)
{
x = a;
a = b;
b = x;
}
if(a < c)
{
x = a;
a = c;
c = x;
}
if(b < c)
{
x = b;
b = c;
c = x;
}