remove double quotes from a string in c++

问题

I am stripping off double quotes from a string, but I keep getting this error from the following function. What is the problem here?

void readCSVCell(stringstream& lineStream, string& s) {
    std::getline(lineStream,s,',');
    s.erase(remove( s.begin(), s.end(), '\"' ), s.end());
}

[ERROR]

c.cpp: In function void readCSVCell(std::stringstream&, std::string&):
c.cpp:11: error: cannot convert __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > to const char* for argument 1 to int remove(const char*)

回答1:

Don't you want something like:

s.erase(remove( s.begin(), s.end(), '\"' ),s.end());

As remove returns "A forward iterator pointing to the new end of the sequence, which now includes all the elements with a value other than value" rather than removing the values.

It compiles fine for me though (with gcc 4.4), so perhaps you just need to include <algorithm> and make sure you are either using namespace std or qualify the name.

回答2:

Do you have stdio.h included? Then there could be a conflict with remove. This is the reason why you always should prefix std-calls with, well, std::.

回答3:

Use std::remove not remove

回答4:

remove is algorithm, hence you need to do #include <algorithm>. Then while using you should use it as std::remove(...).

回答5:

remove requires the algorithm header and is from std namespace

I do find the C++ Reference very helpful for quickly getting usage examples and what headers are required. It may not have complete information for some things but it helps as a good start if I am not sure about how to use some parts of C Library, stream Library, strings library, STL Containers or STL Algorithms

来源：https://stackoverflow.com/questions/5674374/remove-double-quotes-from-a-string-in-c