3つの数のソートの問題

#include<iostream>
#include<stdio.h>
#include<string>

using namespace std;
int main()
{
	int a, b, c, t;
	cout << "     " << endl;
	cin >> a>>b>> c;
	if (a < b)
	{
		t = a;
		a = b;
		b = t;
	}
	if (a < c)
	{
		t = a;
		a = c;
		c = a;
	}
	if (b < c)
	{
		t = b;
		b = c;
		c = b;
	}
	cout << "          " << a<< b<< c << endl;
    system("pause");
	return 0;
}