I'm a total fraud!!! God am I a newbie!!! :)
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Ok... don't comment on the logical side of this code, I just have a small question that needs to be answered...;P This code will give me a "user breakpoint" before exiting if I keep "for(i=6;i<8; i++)". BUT, change that to "for(i=6;i<7; i++)", which will obviously go through the loop only once, will work and exit properly. So I guess that I don't even know how to use chars anymore (thanks to MFC and CString!!!) And I need to know why it won't work and what is the proper way to achieve what I want to do. Here's the code: int main(int argc, char* argv[]) { int i = 6; char *pBody = new char; char sz[4] = "test"; strcpy( pBody, "\0" ); for(i=6;i<8; i++) { strcat( pBody, sz ); strcat( pBody, ": " ); strcat( pBody, sz ); strcat( pBody, "\n" ); } strcat( pBody, "\0" ); return 0; delete [] pBody; pBody = NULL; } Also, I guess it would be a nice thing for me to re-learn C/C++... ;) I feel like a hobbyist... :( Thanks! --------------- Ok, we suck at C/C++, but we're good at website design and MFC apps!!! http://www.edovia.com
Ok, I guess I should use: char *pBody = new char[somevalue]; instead of: char *pBody = new char; silly me...:-O But the thing is that I don't know how many loops I'll have. Can I resize the char on the fly? Or, I could use: char *pBody = new char[nbOfFields-6]; Is that correct? Another question I end up answering myself! :cool: --------------- Nah, we're cool! http://www.edovia.com
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Ok, I guess I should use: char *pBody = new char[somevalue]; instead of: char *pBody = new char; silly me...:-O But the thing is that I don't know how many loops I'll have. Can I resize the char on the fly? Or, I could use: char *pBody = new char[nbOfFields-6]; Is that correct? Another question I end up answering myself! :cool: --------------- Nah, we're cool! http://www.edovia.com
if you want to make memory leaks the second thing works perfectly.. but you can't resize arrays on the heap.. so if oyu wanna resize it.. use sthing like:
char *pBody = 0;
pBody = new char [14];
delete pBody;
pBody = new char [16];//now you have resized pBody from 14 to 16 all the data will be lost..
hope this helps.. (i just can recommend that you try to give std::string a try.. cause i think c-arrays suck royal.. i shot myself in the foot with this too often )
Sometimes I think the surest sign for intelligent life elsewhere in the universe is that none of them ever tried to contact us.
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if you want to make memory leaks the second thing works perfectly.. but you can't resize arrays on the heap.. so if oyu wanna resize it.. use sthing like:
char *pBody = 0;
pBody = new char [14];
delete pBody;
pBody = new char [16];//now you have resized pBody from 14 to 16 all the data will be lost..
hope this helps.. (i just can recommend that you try to give std::string a try.. cause i think c-arrays suck royal.. i shot myself in the foot with this too often )
Sometimes I think the surest sign for intelligent life elsewhere in the universe is that none of them ever tried to contact us.
I wanted to use std::string but a function I use requires a const char[] as a parameter and string.c_str is no good. Unless there's a way to convert the string to a char when I'm done... any ideas? [edit] I guess string.c_str didn't work because I thought it was a variable, not a function. string.c_str() should work. Speaking of work, I think I work too much :laugh: --------------- http://www.edovia.com
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I wanted to use std::string but a function I use requires a const char[] as a parameter and string.c_str is no good. Unless there's a way to convert the string to a char when I'm done... any ideas? [edit] I guess string.c_str didn't work because I thought it was a variable, not a function. string.c_str() should work. Speaking of work, I think I work too much :laugh: --------------- http://www.edovia.com
hemm?
std::string s;
char an_old_array [16] = "";s = "hy luke";
a_old_function (s.c_str());
strcpy (an_old_array, s.c_str());do you have got any other questions ? or what do you need exactly ?
Sometimes I think the surest sign for intelligent life elsewhere in the universe is that none of them ever tried to contact us.
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hemm?
std::string s;
char an_old_array [16] = "";s = "hy luke";
a_old_function (s.c_str());
strcpy (an_old_array, s.c_str());do you have got any other questions ? or what do you need exactly ?
Sometimes I think the surest sign for intelligent life elsewhere in the universe is that none of them ever tried to contact us.
No, you answered it perfectly! It's me that was confused... I should take a nap ;) Thanks Bernard! --------------- http://www.edovia.com
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I wanted to use std::string but a function I use requires a const char[] as a parameter and string.c_str is no good. Unless there's a way to convert the string to a char when I'm done... any ideas? [edit] I guess string.c_str didn't work because I thought it was a variable, not a function. string.c_str() should work. Speaking of work, I think I work too much :laugh: --------------- http://www.edovia.com
perhaps you can use YourConstChar=YourCstring.GetBuffer(0);
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No, you answered it perfectly! It's me that was confused... I should take a nap ;) Thanks Bernard! --------------- http://www.edovia.com
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Ok... don't comment on the logical side of this code, I just have a small question that needs to be answered...;P This code will give me a "user breakpoint" before exiting if I keep "for(i=6;i<8; i++)". BUT, change that to "for(i=6;i<7; i++)", which will obviously go through the loop only once, will work and exit properly. So I guess that I don't even know how to use chars anymore (thanks to MFC and CString!!!) And I need to know why it won't work and what is the proper way to achieve what I want to do. Here's the code: int main(int argc, char* argv[]) { int i = 6; char *pBody = new char; char sz[4] = "test"; strcpy( pBody, "\0" ); for(i=6;i<8; i++) { strcat( pBody, sz ); strcat( pBody, ": " ); strcat( pBody, sz ); strcat( pBody, "\n" ); } strcat( pBody, "\0" ); return 0; delete [] pBody; pBody = NULL; } Also, I guess it would be a nice thing for me to re-learn C/C++... ;) I feel like a hobbyist... :( Thanks! --------------- Ok, we suck at C/C++, but we're good at website design and MFC apps!!! http://www.edovia.com
WHEWWWWWWW!!!!!! When I read this subject, I thought my secret had been exposed. :) Tim Smith I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?
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if you want to make memory leaks the second thing works perfectly.. but you can't resize arrays on the heap.. so if oyu wanna resize it.. use sthing like:
char *pBody = 0;
pBody = new char [14];
delete pBody;
pBody = new char [16];//now you have resized pBody from 14 to 16 all the data will be lost..
hope this helps.. (i just can recommend that you try to give std::string a try.. cause i think c-arrays suck royal.. i shot myself in the foot with this too often )
Sometimes I think the surest sign for intelligent life elsewhere in the universe is that none of them ever tried to contact us.
Shouldn't it be
delete [] pBody;instead ofdelete pBody;? -
Shouldn't it be
delete [] pBody;instead ofdelete pBody;?of course.. sorry.. but i have to say that i hardly (say never) use c-arrays.. so.. that may be the reason why i didn't notice that.. yeah.. have a nice time.. bernhard
Sometimes I think the surest sign for intelligent life elsewhere in the universe is that none of them ever tried to contact us.