C++

Forum

 
Help sorting books in alpha. order - c++

elementx2z (9)
Hey guys, can you help me out with this program I'm writing. I'm supposed to type in a specific data of books (which I have as a txt file and I redirect). The program is supposed to sort the books by price and alphabetical order. I got it down with price, but I can't seem to figure out how to do it in alphabetical order. I looked it up, but there's a few different methods to do it, and I'm completely confused with them. Here's my code so far.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
 
#include <iostream>
using namespace std;

struct Books
{
char Title[128];
char Author[256];
float price;

};
Books BookInfo()
{
Books temp;
cout << "Enter the following information for a Book:" << endl;
cout << "Title: ";
cin.getline( temp.Title, 128 );
cout << "Author: ";
cin.getline( temp.Author, 256 );
cout << "Price: ";
cin >> temp.price;
cin.get(); // get rid of the newline character
return temp;	
}




void SortMyBook( Books Byprices[], int num )
{
int i, j;

for( i= 0; i < num - 1; i++ )
{
for( j= i+1; j < num; j++ )

{
Books temp= Byprices[i];
Byprices[i]= Byprices[j];
Byprices[j]= temp;
}
}
}



void OutputGames( Books Libro[], int num )
{
cout << endl;
for( int i= 0; i < num; i++ )
{
cout << "The output of the book list sorted by price :" << endl;
cout << "Title: " << Libro[i].Title << endl;
cout << "Author: " << Libro[i].Author << endl;
cout << "Price: " << Libro[i].price << endl;
cout << endl;
}
}

const int NUMBER= 5;
int main()
{

Books Libro[NUMBER];

for( int i= 0; i < NUMBER; i++ )

	
Libro[i]= BookInfo();

SortMyBook( Libro, NUMBER );

OutputGames( Libro, NUMBER );
system("pause");
}
Last edited on
frantzdyromain91 (7)
Heres a hint: compare the Char arrays ;)
bluecoder (763)
How can you sort with the price and with the alphabitcal order .. i am little confused .
bluecoder (763)
but you can compare like this . 

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
void SortMyBookWithPrice( Books Byprices[], int num )
{
	int i, j;
	for( i= 0; i < num - 1; i++ )
	{
		if( Byprice[i].price < Byprice[i + 1].price ) 
		{
	
			Books temp= Byprices[i];
			Byprices[i]= Byprices[i + 1];
			Byprices[i + 1]= temp;
		}		
	}
}


void SortMyBookWithTitle( Books Byprices[], int num )
{
	int i, j;
	for( i= 0; i < num - 1; i++ )
	{
		if( Byprice[i].Title[i] < Byprice[i + 1].Title[i+1] ) 
		{
	
			Books temp= Byprices[i];
			Byprices[i]= Byprices[i + 1];
			Byprices[i + 1]= temp;
		}		
	}
}
helios (17574)
frantzdyromain91: char arrays can't be compared (directly).

bluecoder: That doesn't work. In more ways than one.

http://www.cplusplus.com/reference/clibrary/cstring/strcmp/
Although I would suggest using std::string instead.
elementx2z (9)
sorry for the confusion, it would output a list of the books sorted out by price, and a list sorted out in alphabetical order (by the name of the book). The way it's sorted about by price right now is from least to greatest
Topic archived. No new replies allowed.