帮我用IF语句编写一个：输入3个整数，按从小到达的顺序排列出来

#include <iostream>
using namespace std;
int main()
{
int a,b,c;
cout<<"Input three int:";
cin>>a>>b>>c;
int temp;
if(a<b)
{
temp=a;
a=b;
b=temp;
}
if(a<c)
{
temp=a;
a=c;
c=temp;
}//始终保持 a最大
if(b<c)
{
temp=b;
b=c;
c=temp;
}
//保持b次大
cout<<c<<" "<<b<<" "<<a<<endl;
return 1;
}

main(){
int a,b,c,tem,minnum,mednum,maxnum;
printf("\nEnter num a: ");
scanf("%d",&a);
printf("\nEnter num b: ");
scanf("%d",&b);
printf("\nEnter num c: ");
scanf("%d",&c);

printf("\na=%d,b=%d,c=%d&quo