add two or more strings - Overclock.net

kris_cs1 · 07-06-05

Hey again, I can't find this out n the interent. i would expect it to be simple....
I want to add the below strings together to make one string.

Code:

"C:\\Documents and Settings\\Me\\Desktop\\Kris\\Word List\\";
Letter = 'a'
".txt";

Also while i'm here, how can i store the whole of a file in one string variable?

Told you i would be posting often :P
Feel free to take your time to answer... I'm in no hurry

Thanks

*VulcanDragon* · 07-06-05

Are you talking C++ here? If so, you can use the strcat function.

http://www.cplusplus.com/ref/cstring/strcat.html

Some languages include a string concatenation operator. E.g. VB uses the ampersand, and Oracle SQL uses double vertical bars (||).

kris_cs1 · 07-07-05

Quote:

Originally Posted by VulcanDragon

Are you talking C++ here? If so, you can use the strcat function.

http://www.cplusplus.com/ref/cstring/strcat.html

Some languages include a string concatenation operator. E.g. VB uses the ampersand, and Oracle SQL uses double vertical bars (||).

yes, it is for C++.
The strcat() function works with the ".txt" but not in adding the single letter to the string as it is not a string itself

. It says:

Quote:

cannot convert parameter 2 from 'char' to 'const char *'

Thanks

MrSmiley · 07-07-05

Quote:

Originally Posted by kris_cs1

Hey again, I can't find this out n the interent. i would expect it to be simple....
I want to add the below strings together to make one string.

Code:

  "C:\\Documents and Settings\\Me\\Desktop\\Kris\\Word List\\";
  Letter = 'a'
  ".txt";

Also while i'm here, how can i store the whole of a file in one string variable?

Told you i would be posting often :P
Feel free to take your time to answer... I'm in no hurry

Thanks

I actually do not remember if this works but give it a try, I know it works in VBScript, but casting doesn't

, (Knowledge of VBScript is low) anyways take a look.

Code:

  #include<string>
 #include<iostream>
  
  int main()
  {
       string a="what\0", b="Do\0You\0Want?", total;
       total = a + b;
       cout << total;
       return 0;
  }

hehehe I'm actually hating that problem right now. http://www.overclock.net/showthread.php?t=32419

Zeus · 07-07-05

I'm not a C+ expert but I think the code you need is...

char oPath = 'C:\\Documents and Settings\\Me\\Desktop\\Kris\\Word List\\';
char oLetter = 'a';
char oExt = '.txt';

char FullPath = oPath & oLetter & oExt;

*VulcanDragon* · 07-07-05

Quote:

Originally Posted by kris_cs1

yes, it is for C++.
The strcat() function works with the ".txt" but not in adding the single letter to the string as it is not a string itself

.

Can't you send a pointer to variable a instead of variable a itself? I.e., &a?

Alternately, declare a pointer variable and assign it to point to a.

MrSmiley · 07-08-05

Code:

 #include <cstdlib>
 #include <iostream>
 #include<string>
 
 using namespace std;
 
 int main(int argc, char *argv[])
 {
 	/*"C:\\Documents and Settings\\Me\\Desktop\\Kris\\Word List\\";
   Letter = 'a'
   ".txt";*/
 	string dir="C:\\Documents and Settings\\Me\\Desktop\\Kris\\Word List\\", fex=".txt", total;
 	total = dir + fex;
 	cout << total<<endl;
 	system("PAUSE");
 	return EXIT_SUCCESS;
 }

compiles out 0 errors 0 warnings, standard install of dev-c++.

*VulcanDragon* · 07-08-05

Quote:

Originally Posted by MrSmiley

#include<string>

Ah yes, a string library. Forgot about that. I never used it myself, I was more of a C programmer. I did everything the traditional (hard) way, with pointers and memory allocation statements.

But you forgot to include the single char "a" in your code sample. Does the string library handle single char variables the same as a string? I got to thinking about my solution after I posted it and realized that simlpy dereferencing the char variable probably won't work after all, because a char is not a null-terminated string as strcat requires. Does the string library convert char to null-terminated strings where required?

Melraidin · 07-08-05

Quote:

Originally Posted by VulcanDragon

Ah yes, a string library. Forgot about that. I never used it myself, I was more of a C programmer. I did everything the traditional (hard) way, with pointers and memory allocation statements.

But you forgot to include the single char "a" in your code sample. Does the string library handle single char variables the same as a string? I got to thinking about my solution after I posted it and realized that simlpy dereferencing the char variable probably won't work after all, because a char is not a null-terminated string as strcat requires. Does the string library convert char to null-terminated strings where required?

The single character may be appended to the string with the + or += operator.

kris_cs1 · 07-08-05

Arrrggghhh! lol.
Thanks, that works except now because it is a string, it won't open.

Code:

infile.open(File1);

It says:

Quote:

'void std::basic_ifstream<_Elem,_Traits>:

pen(const wchar_t *,std::ios_base:

penmode,int)' : cannot convert parameter 1 from 'std::string' to 'const wchar_t *'

every time i can't do it
i'm so embarrased

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add two or more strings

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