Char* vs std::string

Posted by Lockyer on Stack Overflow See other posts from Stack Overflow or by Lockyer
Published on 2010-04-27T05:26:34Z Indexed on 2010/04/27 5:33 UTC
Read the original article Hit count: 351

Filed under:

char

|

stdstring

Is there any advantage to using char*'s instead of std::string?

I know char*'s are usually defined on the stack, so we know exactly how much memory we'll use, is this actually a good argument for their use? Or is std::string better in every way?

© Stack Overflow or respective owner

Related posts about char

C++ difference between "char *" and "char * = new char[]"

as seen on Programmers - Search for 'Programmers'
So, if I want to declare an array of characters I can go this way char a[2]; char * a ; char * a = new char[2]; Ignoring the first declaration, the other two use pointers. As far as I know the third declaration is stored in heap and is freed using the delete operator . does the second declaration… >>> More
build error with boost spirit grammar (boost 1.43 and g++ 4.4.1)

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm having issues getting a small spirit/qi grammar to compile. The build stack trace is fugly enought to not make any sense to me (despite some assertion_failed i could notice in there but that didn't brought much information) the input grammar header: inputGrammar.h #include <boost/config/warning_disable… >>> More
Const unsigned char* to char*

as seen on Stack Overflow - Search for 'Stack Overflow'
So, I have two types at the moment: const unsigned char* unencrypted_data_char; string unencrypted_data; I'm attempting to perform a simple conversion of data from one to the other (string - const unsigned char*) As a result, I have the following: strcpy((unencrypted_data_char),(unencrypted_data… >>> More
berkeley DB: can't compile c++ codes

as seen on Stack Overflow - Search for 'Stack Overflow'
When I compiled the sample codes of C++, I got following info: c++ excxx_example_database_read.cpp -o dbApp -I /usr/local/BerkeleyDB.5.0/include/ Undefined symbols: "Dbt::Dbt(void*, unsigned int)", referenced from: show_vendor(MyDb&, char const*)in ccnaWItX.o show_item(MyDb&… >>> More
build error with boost spirit grammar (boost 1.43 and g++ 4.4.1) part II

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm having issues getting a small spirit/qi grammar to compile. i am using boost 1.43 and g++ 4.4.1. the input grammar header: inputGrammar.h #include <boost/config/warning_disable.hpp> #include <boost/spirit/include/qi.hpp> #include <boost/spirit/include/phoenix_core.hpp> #include… >>> More

Related posts about stdstring

Managed c++ std::string not accessible in unmanaged c++

as seen on Stack Overflow - Search for 'Stack Overflow'
In unmanaged c++ dll i have a function which takes constant std::string as argument Prototype : void read ( const std::string &imageSpec_ ) I call this function from managed c++ dll by passing a std::string. When i debug the unmanaged c++ code the parameter imageSpec_ shows the value correctly… >>> More
convert string to argv in c++

as seen on Stack Overflow - Search for 'Stack Overflow'
I have an std::string containing a command to be executed with execv, what is the best "C++" way to convert it to the "char *argv[]" that is required by the second parameter of execv()? To clarify: std::string cmd = "mycommand arg1 arg2"; char *cmd_argv[]; StrToArgv(cmd, cmd_argv); // how do I… >>> More
Avoiding improper std::string initialization with NULL const char* using g++

as seen on Stack Overflow - Search for 'Stack Overflow'
A there any g++ options which can detect improper initialization of std::string with NULL const char*? I was in the process of turning some int fields into std::string ones, i.e: struct Foo { int id; Foo() : id(0) {} }; ...turned into: struct Foo { std::string id; Foo() : id(0)… >>> More
unformatted input to a std::string instead of c-string from binary file.

as seen on Stack Overflow - Search for 'Stack Overflow'
ok i have this program working using c-strings. I am wondering if it is possible to read in blocks of unformatted text to a std::string? I toyed arround with if >> but this reads in line by line. I've been breaking my code and banging my head against the wall trying to use std::string, so… >>> More
Char* vs std::string

as seen on Stack Overflow - Search for 'Stack Overflow'
Is there any advantage to using char*'s instead of std::string? I know char*'s are usually defined on the stack, so we know exactly how much memory we'll use, is this actually a good argument for their use? Or is std::string better in every way? >>> More