ordering numbers

[L E G I O N]

hey guys im doing an assignment where if you type in 3 numbers out of order ie. 4 5 4 it should return 4 4 5 this is what i've got so far im able to get it to order them if they're backwards but if they're mixed up i cant get them to re arrange this is the code

#include <iostream>
#include <string>

using namespace std;


int main()
{
	string answer;
	string answer2;
	string answer3;
	cout <<"Enter 3 Numbers: " << endl;
	cin >> answer >> answer2 >> answer3;
	cout << "you entered: " << answer3 << "," << answer2 << "," << answer << endl;
	
	if(answer2 <= answer && answer3 <= answer2 == true);
	{
		return false;
	}

	return 0;

}

[filipe]

Read them into a std::vector and std::sort them. Like this:

std::cout << "Enter 3 numbers:" << std::endl;
std::vector<int> v;
int n;
while(std::cin >> n && v.size() < 3)
{
	v.push_back(n);
}
std::sort(v.begin(), v.end());
std::cout << "You entered:";
for(std::vector<int>::size_type i = 0; i < v.size(); ++i)
{
	std::cout << ' ' << v[i];
}
std::cout << std::endl;

[L E G I O N]

hey man i tried that and it says std::sort isnt in the std library for some reason and i did #include <vector>

[filipe]

#include <algorithm>

When in doubt about something like this, use this site's reference.

[L E G I O N]

i got it running but it doesent display the number they entered :s sorry man i've been struggling with this basic stuff idk why........

[filipe]

Can you post your entire program?

[L E G I O N]

#include <iostream>
#include <string>
#include <algorithm>
#include <vector>

using namespace std;


int main()
{
	std::cout << "Enter 3 numbers:" << std::endl;
std::vector<int> v;
int n;
while(std::cin >> n && v.size() < 3)
{
	v.push_back(n);
}
std::sort(v.begin(), v.end());
std::cout << "You entered:";
for(std::vector<int>::size_type i = 0; i < v.size(); ++i)
{
	std::cout << '  ' << v[i];
}
std::cout << std::endl;

}

btw thanks for all your help man even with the windows programming stuff i really appreciate it

[filipe]

Line 14 needs to be changed:

while(v.size() < 3 && std::cin >> n )

because the size of the vector needs to be evaluated before we try to read again. And you're welcome.

[Tamao]

You might also want to check how to implement your own sorting algorithm, always good for training.

http://www.concentric.net/~ttwang/sort/sort.htm

Start with bubble sort and then check the rest :)

[L E G I O N]

it works now thanks but
when i enter the 3 numbers when it out puts the entries to the console it appears like this
ie. Entered 4 5 4
it couts

8224
8224
8225


so i commented line 23 out


std::cout << ' ' << v[i] << std::endl;

and it displays only the numbers entered

thanks alot man i really appreciate it

[filipe]

You put two spaces inside the single quotes (up in the other post).