CODEWITHSUNDEEP
c++compiler-errors
ker
ker

Reputation: 13

error: expected ‘)’ before ‘<’ token

I'm trying to learn c++ following a book. I've wrote this class definition using std::initializer_list in order to initialize a vector with a list of elements. Vector.h file looks this way:

class Vector
{
public:
    Vector(int s);
    ~Vector();
    Vector(std::initializer_list<double>);
    void push_back(double);
    double& operator[](int i);
    int size();
private:
    double* elem;
    int sz;
};

When I try to compile I have this error message in line 6 (initializer_list one):

error: expected ‘)’ before ‘<’ token

I've also added this code to implement Vector constructor. Vector.cpp looks this way

#include "Vector.h"
#include <stdexcept>

using namespace std;

Vector::Vector(int s)
{
    if(s < 0)
    {
        throw length_error("Vector::operator[]");
    }
    elem = new double[s];
    sz = s;
}

Vector::~Vector()
{
     delete[] elem;
}

Vector::Vector(std::initializer_list<double> lst)
{
    elem = new double[lst.size()];
    sz = static_cast<int>(lst.size());

    copy(lst.begin(), lst.end(), elem);
}

double& Vector::operator[](int i)
{
    if(i<0 || i>=size())
    {
        throw out_of_range("Vector::operator[]");
    }
    return elem[i];
}

int Vector::size()
{
    return sz;
}

but compilation also fails with this message:

error: expected constructor, destructor, or type conversion before ‘(’ token

I'm using Code::Blocks width GNU GCC compiler and no extra compiler flags activated. I've tried checking "Have g++ follow the comming C++0x ISO C++ language standard [-std=c++0x]" in Code::Blocks, but errors remain and three new ones raise.

Upvotes: 1

Views: 5532

Answers (1)

codeist
codeist

Reputation: 196

You are missing #include <initializer_list> also lst.size() instead of lst.size and lst.end() instead of ls.end(). Remember to enable c++11 in compilation.

Upvotes: 2

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