Strings
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i just started learning C++ here is the first problem i encountered. how do you declare String data types. like if i want to have some variables like firstName, lastName; how do i store those variables??? i know it is not like java where you can just declare something as a String. thanks in advance. Marouane
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i just started learning C++ here is the first problem i encountered. how do you declare String data types. like if i want to have some variables like firstName, lastName; how do i store those variables??? i know it is not like java where you can just declare something as a String. thanks in advance. Marouane
Try the c++ forums in the future. But since you asked;
char varname[x];
Does the trick for standard c, where x is the number of character you wish to store. It's basically an array of 1 byte characters. If you're using MFC, you can use the CString class, which offers a host of handy string manipulation functions. Simon Nobody does chicken like MFC Sonork ID 100.10024
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i just started learning C++ here is the first problem i encountered. how do you declare String data types. like if i want to have some variables like firstName, lastName; how do i store those variables??? i know it is not like java where you can just declare something as a String. thanks in advance. Marouane
marouane miftah el kheir wrote: i just started learning C++ here is the first problem i encountered. how do you declare String data types. like if i want to have some variables like firstName, lastName; how do i store those variables??? i know it is not like java where you can just declare something as a String. thanks in advance. Can someone please explain to me why even a simple thing like declaring a variable is such a task to do in C++? Do you really think that by making the programmer declare the variable, it's type AND it's length you are "breeding" better programmers? Just curious, as always :) regards, Paul Watson Bluegrass Cape Town, South Africa "The greatest thing you will ever learn is to love, and be loved in return" - Moulin Rouge Martin Marvinski wrote: Unfortunatly Deep Throat isn't my cup of tea Do you Sonork? I do! 100.9903 Stormfront
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marouane miftah el kheir wrote: i just started learning C++ here is the first problem i encountered. how do you declare String data types. like if i want to have some variables like firstName, lastName; how do i store those variables??? i know it is not like java where you can just declare something as a String. thanks in advance. Can someone please explain to me why even a simple thing like declaring a variable is such a task to do in C++? Do you really think that by making the programmer declare the variable, it's type AND it's length you are "breeding" better programmers? Just curious, as always :) regards, Paul Watson Bluegrass Cape Town, South Africa "The greatest thing you will ever learn is to love, and be loved in return" - Moulin Rouge Martin Marvinski wrote: Unfortunatly Deep Throat isn't my cup of tea Do you Sonork? I do! 100.9903 Stormfront
Indeed. Lately, in my experiments with c#, Once in a while I feel relieved I dont have to worry about the horrors of low-level strings (and the mish-mash of different string classes) constantly. // Rock
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i just started learning C++ here is the first problem i encountered. how do you declare String data types. like if i want to have some variables like firstName, lastName; how do i store those variables??? i know it is not like java where you can just declare something as a String. thanks in advance. Marouane
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marouane miftah el kheir wrote: i just started learning C++ here is the first problem i encountered. how do you declare String data types. like if i want to have some variables like firstName, lastName; how do i store those variables??? i know it is not like java where you can just declare something as a String. thanks in advance. Can someone please explain to me why even a simple thing like declaring a variable is such a task to do in C++? Do you really think that by making the programmer declare the variable, it's type AND it's length you are "breeding" better programmers? Just curious, as always :) regards, Paul Watson Bluegrass Cape Town, South Africa "The greatest thing you will ever learn is to love, and be loved in return" - Moulin Rouge Martin Marvinski wrote: Unfortunatly Deep Throat isn't my cup of tea Do you Sonork? I do! 100.9903 Stormfront
Just a question of using the standard library std::string or MFC CString. As I understand it, in other languages also, strings are implemented as libraries and get included with a header. What is the difference? Is it a fault of the language that programmers still prefer to use character arrays and use string manipulation functions on them? Thomas
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Since the original post was I am new ... std::string is part of STL Standard Template Library. You may want to look that up. Also depending on which compiler/version you have there are a number of string classes. A fair number of people use MFC Microsoft Foundation Class just for the CString class. The last vc release this has been moved to ATL Active Template Library. I hope this is not to much info. To answer your original post however the original responce was correct. A string is an array of chars. It is also standard practice to ask this kind of question in the Message Board area since it is specific to one langauge. Man were things simpler when I started:) Take care,
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marouane miftah el kheir wrote: i just started learning C++ here is the first problem i encountered. how do you declare String data types. like if i want to have some variables like firstName, lastName; how do i store those variables??? i know it is not like java where you can just declare something as a String. thanks in advance. Can someone please explain to me why even a simple thing like declaring a variable is such a task to do in C++? Do you really think that by making the programmer declare the variable, it's type AND it's length you are "breeding" better programmers? Just curious, as always :) regards, Paul Watson Bluegrass Cape Town, South Africa "The greatest thing you will ever learn is to love, and be loved in return" - Moulin Rouge Martin Marvinski wrote: Unfortunatly Deep Throat isn't my cup of tea Do you Sonork? I do! 100.9903 Stormfront
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marouane miftah el kheir wrote: i just started learning C++ here is the first problem i encountered. how do you declare String data types. like if i want to have some variables like firstName, lastName; how do i store those variables??? i know it is not like java where you can just declare something as a String. thanks in advance. Can someone please explain to me why even a simple thing like declaring a variable is such a task to do in C++? Do you really think that by making the programmer declare the variable, it's type AND it's length you are "breeding" better programmers? Just curious, as always :) regards, Paul Watson Bluegrass Cape Town, South Africa "The greatest thing you will ever learn is to love, and be loved in return" - Moulin Rouge Martin Marvinski wrote: Unfortunatly Deep Throat isn't my cup of tea Do you Sonork? I do! 100.9903 Stormfront
Paul Watson wrote: Can someone please explain to me why even a simple thing like declaring a variable is such a task to do in C++? Because this person is a beginner and didn't read any docs. std::string and (under mfc) CString, b_str, char * will all do the job. Christian Christian I have come to clean zee pooollll. - Michael Martin Dec 30, 2001 Picture the daffodil. And while you do that, I'll be over here going through your stuff. Picture a world without war, without hate. And I can picture us attacking that world, because they would never expect it.
Sonork ID 100.10002:MeanManOz
I live in Bob's HungOut now
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Indeed. Lately, in my experiments with c#, Once in a while I feel relieved I dont have to worry about the horrors of low-level strings (and the mish-mash of different string classes) constantly. // Rock
std::string works everywhere. Christian I have come to clean zee pooollll. - Michael Martin Dec 30, 2001 Picture the daffodil. And while you do that, I'll be over here going through your stuff. Picture a world without war, without hate. And I can picture us attacking that world, because they would never expect it.
Sonork ID 100.10002:MeanManOz
I live in Bob's HungOut now
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Many times it is much easier to work with a standard C string than these string classes. Not to mention it is MUCH faster. Tim Smith Descartes Systems Sciences, Inc.
Tim Smith wrote: Many times it is much easier to work with a standard C string than these string classes. Not to mention it is MUCH faster. Hmm... Not to C/C++ newcomers... Think about a Java or VB programmer being exposed for the first time to pointers (although in VB you can convert freely a string into a byte array) It's hard for them to understand that char * == char[] and this is a string zero terminated. It's hard for them having to allocate memory before strcpying. It's hard for them understanding why they can't return a pointer to a stack allocated char[]. STL is actually simple, although the docs are not, but MS implementation gives so many warnings that scare a beginner to his bones. I would recomend to a Visual C++ beginner using MFC's CString until he becomes more comfortable with pointers and arays. THEN he can start Crivo Automated Credit Assessment
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Tim Smith wrote: Many times it is much easier to work with a standard C string than these string classes. Not to mention it is MUCH faster. Hmm... Not to C/C++ newcomers... Think about a Java or VB programmer being exposed for the first time to pointers (although in VB you can convert freely a string into a byte array) It's hard for them to understand that char * == char[] and this is a string zero terminated. It's hard for them having to allocate memory before strcpying. It's hard for them understanding why they can't return a pointer to a stack allocated char[]. STL is actually simple, although the docs are not, but MS implementation gives so many warnings that scare a beginner to his bones. I would recomend to a Visual C++ beginner using MFC's CString until he becomes more comfortable with pointers and arays. THEN he can start Crivo Automated Credit Assessment
STL is simple. That doesn't mean it is right for every task. Many times you need to modify the string in place and operatate with portions of the string. STL just doesn't handle this well. Then there is the allocation of the memory every time you do an assign. That is just SLOWWWWWWWW. If all I need to do is string processing, I still use standard C strings. There is no point in using STL strings when all the do is slow the software down and complicate the code. Like I have always said, use the proper tool for the job. Sometimes it is STL strings, sometimes it is C strings. Tim Smith Descartes Systems Sciences, Inc.
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marouane miftah el kheir wrote: i just started learning C++ here is the first problem i encountered. how do you declare String data types. like if i want to have some variables like firstName, lastName; how do i store those variables??? i know it is not like java where you can just declare something as a String. thanks in advance. Can someone please explain to me why even a simple thing like declaring a variable is such a task to do in C++? Do you really think that by making the programmer declare the variable, it's type AND it's length you are "breeding" better programmers? Just curious, as always :) regards, Paul Watson Bluegrass Cape Town, South Africa "The greatest thing you will ever learn is to love, and be loved in return" - Moulin Rouge Martin Marvinski wrote: Unfortunatly Deep Throat isn't my cup of tea Do you Sonork? I do! 100.9903 Stormfront
It's a C thing not a C++ thing. C++ has the wonderful STL where we can using strings, instead of declaring character arrays - heck even MFC provides a CString class. Most of the crap in C++ can be blamed on C programmers :-D Michael :-)