从 C++ 中的字符串中删除双引号

Question

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*)

Answer 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.

Answer 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:: .

Answer 3

使用std::remove不remove

Answer 4

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

Answer 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

Answer 6

You can use below code to remove double quotes from string in C++.

stringVariable.erase(
    std::remove(stringVariable.begin(), stringVariable.end(), '\"'), 
    stringVariable.end());