Copying Portion of a String C++

[StunnerAlpha]

Ey guys, yes it is me again. Hopefully with a not-so-stupid question this time.

I have a string like so:


" hello world! "

and I wish to remove ONLY the '"' characters, while leaving the spaces intact.
After some googling this is what I ended up concocting:


std::string evaluate::cleanStr(std::string rawStr){
std::string cleanStr;
cleanStr.assign(rawStr);
std::remove(cleanStr.begin(), cleanStr.end(), '"');
return cleanStr;
}//cleanStr()

And the output:


hello world! "

It appears that the remove is not removing the last '"' character. How do I get around this? Thanks in advance!

[dwhitney67]

An alternate approach:


#include <string>
#include <iostream>

std::string removeChar(const std::string& str, const char ch)
{
std::string mod(str);

size_t pos = std::string::npos;

while ((pos = mod.find(ch)) != std::string::npos)
{
mod.erase(pos, 1);
}

return mod;
}

int main()
{
const std::string orig("\"....Hello World!....\"");

const std::string mod = removeChar(orig, '\"');

std::cout << "orig str = " << orig << std::endl;
std::cout << "mod str = " << mod << std::endl;
}


Or easier yet... I should have thought of this in the first place:


#include <string>
#include <algorithm>
#include <iostream>

std::string removeChar(const std::string& str, const char ch)
{
std::string mod(str);

mod.assign(mod.begin(), std::remove(mod.begin(), mod.end(), ch));

return mod;
}

int main()
{
const std::string orig("\"....Hello World!\"....\"\"");

const std::string mod = removeChar(orig, '\"');

std::cout << "orig str = " << orig << std::endl;
std::cout << "mod str = " << mod << std::endl;
}

[Some Penguin]

Ey guys, yes it is me again. Hopefully with a not-so-stupid question this time.

It appears that the remove is not removing the last '"' character. How do I get around this? Thanks in advance!

http://www.dreamincode.net/forums/topic/32349-stl-remove-algorithm-c/

Read it carefully.

[dribeas]

The solution by dwithney67 will remove all " from the input. If you have more knowledge of how the input is (for example you know that the " are the first and last character, then you can use that information to your advantage:



std::string input = "\"This begins and ends in double quotes\"";
std::string clean = input.substr(1,input.size()-2); // remove first and last characters
// or:
std::string clean2( input.begin()+1, input.end()-1);