Programming Forums > Application Development > C++

layer · Mar 6th, 2005, 6:40 PM

hello again...im making a little command line and need a little help... well, fist ill show the code, then the questions! (1 question actualy)

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#include <cstdlib>
#include <iostream>
#include <windows.h>

using namespace std;

int main()
{
    string line; 
    cout << "EasyCommand v. 1.0.0 BETA\n";
    cout << "Copyright (c) 2005-2006\n";
    cout << "Type 'help' for help\n\n";
    do { 
        cout << ": ";
        cin >> line;
        if (line == "exit"){
                 return 0;
        }
        if (line == "box"){
                 string buffer;
                 cout << "\nEnter a title: ";
                 cin >> buffer;
                 string buffertwo;
                 cout << "\nEnter the text: ";
                 cin >> buffertwo;
                 MessageBox(NULL, buffertwo, buffer, 0);
                 }
        if (line == "clear"){
                 system("cls"); 
                 cout << "\n";
        }
        if (line == "pause"){
             system("pause"); 
             cout << "\n";
        }
        if (line == "help"){
             cout << "\nBOX   Used to display a simple messagebox\nExample - Box (Output)Title: TitleHere (Output)Text: TextHere\nCLEAR Used to clear the console screen\nExample - clear\nEXIT  Used to exit the console\nExample - exit\nHELP  Used to display a list of commands\nExample - help\nPAUSE Used to pause the console \nExample - pause\n";
      }
  } while (line != "exit");
  cout << "Exiting...";
  return 0;
}

ok, when i try to compile that, i get this error:

Quote:

26 C:\Documents and Settings\ryanmoore\Desktop\Goal\main.cpp cannot convert `std::string' to `const CHAR*' for argument `2' to `int MessageBoxA(HWND__*, const CHAR*, const CHAR*, UINT)'

now its obviously got something to do with the box section of the code... could someone PELASE explain to me what i am doing wrong with it? thanks a bunch!

Ooble · Mar 6th, 2005, 7:24 PM

In the message box, you can't use a string - you have to use a character array. You do this by converting the string to the array when you need it:
buffertwo becomes buffertwo.c_str() - this converts it into a C-style string (AKA a character array).

layer · Mar 6th, 2005, 7:39 PM

hey! thanks Ooble! works great now... except one thing

i had to change it to char, but before i did, i tried what you told me, but when i chose a title or the text there could be no spaces, because anything after the space wouldnt show up, so heres how i approched it:

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        if (line == "box"){
                 char buffer[100];
                 cout << "\nEnter the text: ";
                 cin.getline(buffer,100);
                 char buffertwo[100];
                 cout << "\nEnter the title: ";
                 cin.getline(buffertwo,100);
                 MessageBox(NULL, buffer, buffertwo, 0);
                 }

now that works great, but it always skips the text section, it will be like this:

Quote:

Enter the text: \\ this is what gets skips, although it gets printed out, you cant input anything into it because it goes to title..
Enter the title: |cursorhere|

anymore suggestions? thanks!

layer · Mar 6th, 2005, 7:53 PM

to explain it a little better... it doesnt let the user input anything for the text, it skips right over that and goes to title... please ask if you do not understand, i will explain it better if needed :o

Infinite Recursion · Mar 7th, 2005, 9:43 AM

changing your line to this:

MessageBox(NULL, buffertwo.c_str(), buffer.c_str(), 0);

works fine for me... could you explain your last problem a bit more, if this does not resolve it?

layer · Mar 7th, 2005, 3:15 PM

but see, heres the thing, if i use that... then if i type in "Hello World!", ONLY Hello shows up... sooo... any suggestions

and

while im here... ill ask this... how do i split a string in C++? lets say i typed in this to the console: "box TitleHere TextHere"... is there a way i can split that up so that i would end up with something like:

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string title = TitleHere;
string text = TextHere;

? for now im going to try to google it, but if i could figure this out, then that would solve my first question.. so im going to reasearch it, but if anyone else knows, could you please share? thanks a bunch (please tell me if im asking too much)

BaroN NighT · Mar 7th, 2005, 3:24 PM

Quote:

Originally Posted by Ooble

In the message box, you can't use a string - you have to use a character array.

Why can't you use a string?

Infinite Recursion · Mar 7th, 2005, 3:47 PM

as far as what the user types in... look into using the getline() function for your line variable.

The splitting of strings is possible via the standard template library... there are also a few snippets on the web that brute force it by looking for white space in character arrays and such.

layer · Mar 7th, 2005, 4:01 PM

thanks guys... i think i got all the info i need now.. although i may be posting back later, so keep checking the forums!

but ive found a string splitting solution

heres the website i got it at

: http://www.codeguru.com/Cpp/Cpp/stri...cle.php/c9279/

although i had to remove the _T and Console::WriteLine because the _T gave me erros, but i removed it and it worked fine and, for Console::WriteLine i dont know if it would have worked or not but i just used cout

thanks a million guys! (when im finished with this project, i will be posting it in the "Finished Projects" section, but i dont know when it will be finished, maybe tonight, maybe in a week, i cant tell the future, only sometimes!)

layer · Mar 7th, 2005, 4:45 PM

k, i lied, now im getting frusterated! could someone please explain to me, why i get this error when trying to compile this code...:

(Toggle Plain Text)

#include <cstdlib>
#include <iostream>
#include <windows.h>

using namespace std;


void strtoktest()
{  
  char input[] = line;
  char delimiters[] = ("print ");

  for (char* token = strtok(input, delimiters);
       token != NULL;
       token = strtok(NULL, delimiters))
  {
    cout << "\n";   
    cout << (token);
  }
}

int main()
{
    string line; 
    cout << "EasyCommand v. 1.0.0 BETA\n";
    cout << "Copyright (c) 2005-2006\n";
    cout << "Type 'help' for help\n\n";
    do { 
        //cout << ": ";
        cin >> line;
        if (line == "exit"){
                 return 0;
        }
        if (line == "box"){
                 char buffer[100];
                 cout << "\nEnter the title of the messagebox: ";
                 cin.getline(buffer,100);
                 char buffertwo[100];
                 cout << "\nEnter the text of the messagebox: ";
                 cin.getline(buffertwo,100);
                 MessageBox(NULL, buffertwo, buffer, 0);
                 }
        if (line == "clear"){
                 system("cls"); 
                 cout << "\n";
        }
        if (line == "pause"){
             system("pause"); 
             cout << "\n";
        }
        if (line == "help"){
             cout << "\nBOX   Used to display a simple messagebox\nExample - Box 'Title Here' 'Text Here'\nCLEAR Used to clear the console screen\nExample - clear\nEXIT  Used to exit the console\nExample - exit\nHELP  Used to display a list of commands\nExample - help\nPAUSE Used to pause the console \nExample - pause\nPRINT Used to echo things out into the console\nExample - print 'text here'\n";
        }
        if (line == "print "){
             strtoktest();    
        }
  } while (line != "exit");
  cout << "Exiting...";
  return 0;
}

it says that line is undelared and to use this function first... now i know what that means... so i tried to put this function AFTER the int main and then main didnt know what strtoktest() meant so i put it back before main.. is there like a way, to make string line; global? (im used to autoit where you could go like: Global $variable... is there a way to do this, please ask if you do not understand what i mean... thanks

Mar 6th, 2005, 7:24 PM	#2
Ooble I eat cake for breakfast. Join Date: Jul 2004 Location: In my box. Posts: 4,434 Rep Power: 9	In the message box, you can't use a string - you have to use a character array. You do this by converting the string to the array when you need it: buffertwo becomes buffertwo.c_str() - this converts it into a C-style string (AKA a character array). __________________ Me :: You :: Them

Mar 7th, 2005, 9:43 AM	#5
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	changing your line to this: MessageBox(NULL, buffertwo.c_str(), buffer.c_str(), 0); works fine for me... could you explain your last problem a bit more, if this does not resolve it? __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Mar 7th, 2005, 3:15 PM	#6
layer Hobbyist Programmer Join Date: Feb 2005 Posts: 112 Rep Power: 4	but see, heres the thing, if i use that... then if i type in "Hello World!", ONLY Hello shows up... sooo... any suggestions and while im here... ill ask this... how do i split a string in C++? lets say i typed in this to the console: "box TitleHere TextHere"... is there a way i can split that up so that i would end up with something like: (Toggle Plain Text) string title = TitleHere; string text = TextHere; string title = TitleHere; string text = TextHere; ? for now im going to try to google it, but if i could figure this out, then that would solve my first question.. so im going to reasearch it, but if anyone else knows, could you please share? thanks a bunch (please tell me if im asking too much)

Mar 7th, 2005, 3:47 PM	#8
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	as far as what the user types in... look into using the getline() function for your line variable. The splitting of strings is possible via the standard template library... there are also a few snippets on the web that brute force it by looking for white space in character arrays and such. __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Mar 7th, 2005, 4:45 PM	#10
layer Hobbyist Programmer Join Date: Feb 2005 Posts: 112 Rep Power: 4	k, i lied, now im getting frusterated! could someone please explain to me, why i get this error when trying to compile this code...: (Toggle Plain Text) #include <cstdlib> #include <iostream> #include <windows.h> using namespace std; void strtoktest() { char input[] = line; char delimiters[] = ("print "); for (char* token = strtok(input, delimiters); token != NULL; token = strtok(NULL, delimiters)) { cout << "\n"; cout << (token); } } int main() { string line; cout << "EasyCommand v. 1.0.0 BETA\n"; cout << "Copyright (c) 2005-2006\n"; cout << "Type 'help' for help\n\n"; do { //cout << ": "; cin >> line; if (line == "exit"){ return 0; } if (line == "box"){ char buffer[100]; cout << "\nEnter the title of the messagebox: "; cin.getline(buffer,100); char buffertwo[100]; cout << "\nEnter the text of the messagebox: "; cin.getline(buffertwo,100); MessageBox(NULL, buffertwo, buffer, 0); } if (line == "clear"){ system("cls"); cout << "\n"; } if (line == "pause"){ system("pause"); cout << "\n"; } if (line == "help"){ cout << "\nBOX Used to display a simple messagebox\nExample - Box 'Title Here' 'Text Here'\nCLEAR Used to clear the console screen\nExample - clear\nEXIT Used to exit the console\nExample - exit\nHELP Used to display a list of commands\nExample - help\nPAUSE Used to pause the console \nExample - pause\nPRINT Used to echo things out into the console\nExample - print 'text here'\n"; } if (line == "print "){ strtoktest(); } } while (line != "exit"); cout << "Exiting..."; return 0; } #include <cstdlib> #include <iostream> #include <windows.h> using namespace std; void strtoktest() { char input[] = line; char delimiters[] = ("print "); for (char* token = strtok(input, delimiters); token != NULL; token = strtok(NULL, delimiters)) { cout << "\n"; cout << (token); } } int main() { string line; cout << "EasyCommand v. 1.0.0 BETA\n"; cout << "Copyright (c) 2005-2006\n"; cout << "Type 'help' for help\n\n"; do { //cout << ": "; cin >> line; if (line == "exit"){ return 0; } if (line == "box"){ char buffer[100]; cout << "\nEnter the title of the messagebox: "; cin.getline(buffer,100); char buffertwo[100]; cout << "\nEnter the text of the messagebox: "; cin.getline(buffertwo,100); MessageBox(NULL, buffertwo, buffer, 0); } if (line == "clear"){ system("cls"); cout << "\n"; } if (line == "pause"){ system("pause"); cout << "\n"; } if (line == "help"){ cout << "\nBOX Used to display a simple messagebox\nExample - Box 'Title Here' 'Text Here'\nCLEAR Used to clear the console screen\nExample - clear\nEXIT Used to exit the console\nExample - exit\nHELP Used to display a list of commands\nExample - help\nPAUSE Used to pause the console \nExample - pause\nPRINT Used to echo things out into the console\nExample - print 'text here'\n"; } if (line == "print "){ strtoktest(); } } while (line != "exit"); cout << "Exiting..."; return 0; } it says that line is undelared and to use this function first... now i know what that means... so i tried to put this function AFTER the int main and then main didnt know what strtoktest() meant so i put it back before main.. is there like a way, to make string line; global? (im used to autoit where you could go like: Global $variable... is there a way to do this, please ask if you do not understand what i mean... thanks

Mar 6th, 2005, 7:53 PM	#4
layer Hobbyist Programmer Join Date: Feb 2005 Posts: 112 Rep Power: 4	to explain it a little better... it doesnt let the user input anything for the text, it skips right over that and goes to title... please ask if you do not understand, i will explain it better if needed :o

Mar 7th, 2005, 4:01 PM	#9
layer Hobbyist Programmer Join Date: Feb 2005 Posts: 112 Rep Power: 4	thanks guys... i think i got all the info i need now.. although i may be posting back later, so keep checking the forums! but ive found a string splitting solution heres the website i got it at : http://www.codeguru.com/Cpp/Cpp/stri...cle.php/c9279/ although i had to remove the _T and Console::WriteLine because the _T gave me erros, but i removed it and it worked fine and, for Console::WriteLine i dont know if it would have worked or not but i just used cout thanks a million guys! (when im finished with this project, i will be posting it in the "Finished Projects" section, but i dont know when it will be finished, maybe tonight, maybe in a week, i cant tell the future, only sometimes!)

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Programming Forums > Application Development > C++

Weird compiler error (Dev-Cpp 4.9.9.2)