character array and vector

This is a discussion on character array and vector within the C++ Programming forums, part of the General Programming Boards category; how do i store character array in vector Code: #include<iostream> #include<queue> #include<vector> #include<string> using namespace std; int main() { char ...

  1. #1
    dpp
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    character array and vector

    how do i store character array in vector
    Code:
    #include<iostream>
    #include<queue>
    #include<vector>
    #include<string>
    using namespace std;
    int main()
    {
        char *s;
    vector</*how do i define*/>v;
    vector</*how do i define*/>::iterator it;
    
        
        char alts[10];
        for(int i=0;i<5;i++)
        {
        scanf("%s",alts);
       v.push_back(alts);
    }
    for ( it=myvector.begin() ; it < myvector.end(); it++ )
        cout << " " << *it;
    
     
       
        return 0;
    }

  2. #2
    Guest Sebastiani's Avatar
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    How about vector< char >? Yes, it really is that simple! Just keep in mind that push_back stores a single element. To concatenate 'alts' to 'myvector', you'll need to use the 'insert' member function. Oh, and you really shouldn't be mixing scanf with C++ streams (and anyway, they can do all of that and more). Also, another option is to just use an std::string - you can pass it to std::getline, and concatenate with the += operator, etc...

  3. #3
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    Try replacing /* how do i define*/ with string.

    Even better, try using cin (the C++ stream that allows reading from standard input) rather than scanf(). There are specific operations that allow C++ strings to be read from C++ istreams, and no danger of overflowing arrays of char.

    Also, in the loop to output the vector, the end condition will often be brtter expressed as "it != myvector.end()"
    Right 98% of the time, and don't care about the other 3%.

    If I seem grumpy or unhelpful in reply to you, or tell you you need to demonstrate more effort before you can expect help, it is likely you deserve it. Suck it up, Sunshine, and read this, this, and this before posting again.

  4. #4
    dpp
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    i would like to store an array of chars
    eg:
    ABC
    DEF

    Moreover my requirement is to use scanf

  5. #5
    Captain Crash brewbuck's Avatar
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    To convert an array of char to vector of char:

    Code:
    char array[ N ] = { ... };
    std::vector< char > vec( array, array + N );
    If reading from a stream, then...

    Code:
    #include <iterator>
    
    std::cin >> std::noskipws;
    std::vector< char > vec( std::istream_iterator< char >( std::cin ), std::istream_iterator< char >() );
    Code:
    //try
    //{
    	if (a) do { f( b); } while(1);
    	else   do { f(!b); } while(1);
    //}

  6. #6
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    Quote Originally Posted by dpp View Post
    i would like to store an array of chars
    eg:
    ABC
    DEF

    Moreover my requirement is to use scanf
    Seems like a completely contrived/artificial requirement to me.

    In any event, the first line of my previous post will meet your original requirement. A std::string contains a representation of an array of chars.
    Right 98% of the time, and don't care about the other 3%.

    If I seem grumpy or unhelpful in reply to you, or tell you you need to demonstrate more effort before you can expect help, it is likely you deserve it. Suck it up, Sunshine, and read this, this, and this before posting again.

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