Thread: Why am I using single quotes around "|"?

Hi

I myself wrote the code below some months ago. But now I have forgotten much of C++ I learned so please help me to rejuvenate the memory. Why did I use single quotes around "|"? Shouldn't I have used double quotes? I know there is a reason for using single quotes but I can't recall it. Please help me. Thank you.

Code:

/* arranging the three numbers in ascending order assuming the numbers 
are distinct */

// there would be six permutations in total

#include <iostream>
#include <cstdlib>

using namespace std;

int main()

{
 	float A, B, C;
 	
 	cout << "enter the numbers A, B, C" << endl ;
 	
 	cout << "enter A = " ;
 	cin >> A;
 	
 	cout << "enter B = " ;
 	cin >> B;
 	
 	cout << "enter C = " ;
 	cin >> C;
 	
 	
        if ( (A < B) && (B < C) )
            cout << "the ascending order is " << A << '|' << B << '|' << C << endl; 
 	   
        else if ( (A < C) && (C < B) )
            cout << "the ascending order is " << A << '|' << C << '|' << B << endl; 
 	   
        else if ( (B < A) && (A < C) )
            cout << "the ascending order is " << B << '|' << A << '|' << C << endl; 
 	   
        else if ( (B < C) && (C < A) )
            cout << "the ascending order is " << B << '|' << C << '|' << A << endl; 
 	   
        else if ( (C < A) && (A < B) )
            cout << "the ascending order is " << C << '|' << A << '|' << B << endl; 
 	   
        else if ( (C < B) && (B < A) )
            cout << "the ascending order is " << C << '|' << B << '|' << A 
            << endl; 
    
        else
            cout << "Input error" << endl;
		
	
 	   
    system("pause");
    
    return 0;
    
}