remove double quotes from a string in c++

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*)

Have you checked this question http://stackoverflow.com/questions/556277/trim-remove-a-tab-t-from-a-string — Zuljin, Apr 15 '11 at 08:53
Adding 'algorithm' header file and prefixing with std namespace fixed the problem. — user236215, Apr 15 '11 at 08:56

score 14 · Answer 1 · answered Apr 15 '11 at 08:52

14

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.

answered Apr 15 '11 at 08:52

Jeff Foster

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It compiles fine for me, so I guess the error is with the namespacing of remove or a conflict with another header file as Space_C0wb0y suggests. – Jeff Foster Apr 15 '11 at 08:55

score 4 · Answer 2 · answered Apr 15 '11 at 08:52

4

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::.

answered Apr 15 '11 at 08:52

Björn Pollex

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score 3 · Answer 3 · answered Apr 15 '11 at 08:53

3

Use std::remove not remove

answered Apr 15 '11 at 08:53

Erik

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score 2 · Answer 4 · edited Feb 18 '20 at 16:21

2

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

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

edited Feb 18 '20 at 16:21

Vladimir Bershov

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answered Feb 18 '20 at 15:45

Praveen Vishwakarma

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score 1 · Answer 5 · answered Apr 15 '11 at 08:55

1

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

answered Apr 15 '11 at 08:55

Naveen

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score 1 · Answer 6 · answered Apr 15 '11 at 09:21

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

remove double quotes from a string in c++

6 Answers6

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