Programming Forums > Application Development > C++

crawforddavid2006 · Jul 19th, 2006, 10:09 PM

Does anyone know if there is a parseString method in C++? If so could you please show me how to use it too. Thanks

Prm753 · Jul 19th, 2006, 10:33 PM

Perhaps this will help? http://www.harding.edu/USER/fmccown/...p_strings.html

DaWei · Jul 19th, 2006, 10:42 PM

You should bear in mind that C/C++ are relatively strongly typed. A C-string is an array of char. A C++ string is a string object. An int is an int. Aside from any adaptive objects you might create, or aside from making a relatively straightforward conversion (as int to float), everything else is essentially caused by you and healed by you.

crawforddavid2006 · Jul 20th, 2006, 4:36 PM

what i'm trying to do is run a loop that will generate numbers from 1 to 50 lets say and then concatinate that number with a string but it won't let me do that since it is a number and string.

coldDeath · Jul 20th, 2006, 4:49 PM

Can't you convert your number type into a string type before concatination?

DaWei · Jul 20th, 2006, 5:03 PM

You didn't indicate whether you were working with ANSI strings or C strings (arrays of char). If this is the wrong one, you can use it as a guide to convert, or post back.

(Toggle Plain Text)

#include <iostream>
#include <string>

using std::cout;
using std::endl;
using std::cin;

int main (int argc, char *argv[])
{
   char theBaseString [] = "Base + ";
   char theCombination [256] = "";

   for (int i = 0; i < 20; ++i)
   {
	sprintf (theCombination, "%s%d", theBaseString, i);
	cout << theCombination << endl;
   }
    cin.get ();
    return 0;
}

Quote:

Originally Posted by The Output

Base + 0
Base + 1
Base + 2
Base + 3
Base + 4
Base + 5
Base + 6
Base + 7
Base + 8
Base + 9
Base + 10
Base + 11
Base + 12
Base + 13
Base + 14
Base + 15
Base + 16
Base + 17
Base + 18
Base + 19

Game_Ender · Jul 20th, 2006, 5:26 PM

You can also use string streams and c++ strings and not worry about that unsafe sprintf. Well its not unsafe in this context, but in general you should use snprintf when available.

 c Syntax (Toggle Plain Text) 
#include <iostream>
#include <sstream>
 
int main()
{
    std::string base("Base + ");
    std::string result;
 
    for(int i = 0; i <= 20; ++i)
    {
        std::ostringstream ss;
        ss << base << i;
        result = ss.str();
        std::cout << result << std::endl;
    }
 
    cin.get();
    return 0;
}
#include <iostream>
#include <sstream>

int main()
{
    std::string base("Base + ");
    std::string result;

    for(int i = 0; i <= 20; ++i)
    {
        std::ostringstream ss;
        ss << base << i;
        result = ss.str();
        std::cout << result << std::endl;
    }

    cin.get();
    return 0;
}

Jul 19th, 2006, 10:33 PM	#2
Prm753 Professional Programmer Join Date: Oct 2005 Location: United States Posts: 447 Rep Power: 4	Perhaps this will help? http://www.harding.edu/USER/fmccown/...p_strings.html __________________ The world's first athletic computer geek! The home of PrProgramsStudios How not to post a question: <-- Please don't reply

Jul 19th, 2006, 10:42 PM	#3
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	You should bear in mind that C/C++ are relatively strongly typed. A C-string is an array of char. A C++ string is a string object. An int is an int. Aside from any adaptive objects you might create, or aside from making a relatively straightforward conversion (as int to float), everything else is essentially caused by you and healed by you. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Jul 20th, 2006, 4:49 PM	#5
coldDeath Expert Programmer Join Date: Aug 2005 Location: UK Posts: 862 Rep Power: 4	Can't you convert your number type into a string type before concatination? __________________ Programming Tutorials - Linux Installation Guide - Learn Python - Learn C++ Got Slack? Join us at #programmingforums @ irc.freenode.net! My software never has bugs. It just develops random features.

Jul 20th, 2006, 5:26 PM	#7
Game_Ender Professional Programmer Join Date: May 2006 Location: Maryland, USA Posts: 306 Rep Power: 3	You can also use string streams and c++ strings and not worry about that unsafe sprintf. Well its not unsafe in this context, but in general you should use snprintf when available. c Syntax (Toggle Plain Text) #include <iostream> #include <sstream> int main() { std::string base("Base + "); std::string result; for(int i = 0; i <= 20; ++i) { std::ostringstream ss; ss << base << i; result = ss.str(); std::cout << result << std::endl; } cin.get(); return 0; } #include <iostream> #include <sstream> int main() { std::string base("Base + "); std::string result; for(int i = 0; i <= 20; ++i) { std::ostringstream ss; ss << base << i; result = ss.str(); std::cout << result << std::endl; } cin.get(); return 0; }

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)