DaniWeb Forum Index > Software Development > C++

C++ RSS

convert integer to array of character???

•

Join Date: Nov 2007

Posts: 9

Reputation: sunrise2007 is an unknown quantity at this point

Solved Threads: 0

sunrise2007 sunrise2007 is offline

Offline

Newbie Poster

convert integer to array of character???

Nov 11th, 2007

hi every body...
i have problem in my project,and i need help to solve it
the problem is ::
i have string variable and i want to store two values in it
one value is string that insert it by the user and another value is integer that is generated by the system...
the problem is in the integr value how can i append it to the string??
i think ,it must convert the integr and store it in array of characters ,then append the array to the string
see my code:::
that convert the integer into array of character the number consists three digits..
is it correct or not and what is the possible solutions???
thank you...

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include  <iostream>
#include<string>
#include<iomanip>
using namespace std;
int main()
{
	char x[3];
	int n,j=100,i=0;
	cout<<"Enter";
	cin>>n;
		while(j>=1)
		{
			x[i]=n/j;
			n=n%j;
			j=j/10;
			i++;
		}
 
 
 
	return 0;
}
#include  <iostream>
#include<string>
#include<iomanip>
using namespace std;
int main()
{
	char x[3];
	int n,j=100,i=0;
	cout<<"Enter";
	cin>>n;
		while(j>=1)
		{
			x[i]=n/j;
			n=n%j;
			j=j/10;
			i++;
		}
		
		
    
	return 0;
}

Last edited by sunrise2007; Nov 11th, 2007 at 7:56 pm.

•

Join Date: Oct 2007

Posts: 1,951

Reputation: Duoas has much to be proud of

Solved Threads: 214

Duoas

Offline

Posting Virtuoso

Re: convert integer to array of character???

Nov 11th, 2007

Use the stringstream class:

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include <iostream>
#include <sstream>
using namespace std;
 
int main() {
  stringstream ss;
  string user_input_string;
  int    user_input_int;
 
  cout << "Please enter a word and a whole number: ";
  cin >> user_input_string >> user_input_int;
  cin.ignore( 10000 );
 
  ss << "The word is \"" << user_input_string
     << "\" and the number is " << user_input_int << ".";
 
  cout << ss.str() << endl;
  return EXIT_SUCCESS;
  }
#include <iostream>
#include <sstream>
using namespace std;

int main() {
  stringstream ss;
  string user_input_string;
  int    user_input_int;

  cout << "Please enter a word and a whole number: ";
  cin >> user_input_string >> user_input_int;
  cin.ignore( 10000 );

  ss << "The word is \"" << user_input_string
     << "\" and the number is " << user_input_int << ".";

  cout << ss.str() << endl;
  return EXIT_SUCCESS;
  }

A string stream is like a file stream, but it works on a string instead of a file ;->
Get the string from the string stream with the str() member function (see line 17).

Hope this helps.

Last edited by Duoas; Nov 11th, 2007 at 9:46 pm.

•

Join Date: Nov 2007

Posts: 9

Reputation: sunrise2007 is an unknown quantity at this point

Solved Threads: 0

sunrise2007 sunrise2007 is offline

Offline

Newbie Poster

Re: convert integer to array of character???

Nov 12th, 2007

wooooooow:::
thank you Duoas so much...
it is great job ,
i really wander ,it is easy
but i have questions to fully understand the code;
the line 6 ::is it like declare a varible or pointer or what ?? then store the values inside it???
becouse ,when i print ss without str() i
see address ,what is that mean??
what is line 12,18 mean??
is there any different when i return 0 ??
---------------
i know ,i have stupied questions but,really i surprized!!!!
Thnak you for great help

•

Join Date: Sep 2004

Posts: 7,541

Reputation: Narue has a reputation beyond repute

Solved Threads: 704

Narue

Offline

Code Goddess

Re: convert integer to array of character???

Nov 12th, 2007

>the line 6 ::is it like declare a varible or pointer or what ??
It's an object definition. stringstream is a class, just like string.

>becouse ,when i print ss without str() i see address ,what is that mean??
It means that stringstream doesn't have an overloaded operator<< for stringstream, so cout treats it like a pointer and prints the address.

>what is line 12,18 mean??
The proper grammar is: "What do lines 12 and 18 mean?". Line 12 reads up to 10,000 characters or until a newline is found and throws them away. Line 18 returns success from main, obviously.

>is there any different when i return 0 ??
No.

I'm here to prove you wrong.