Passing a vector back to main

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  1. #1
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    Passing a vector back to main

    Question: How do I pass a vector of strings back to main?

    The code below is wrong, but what should it be?


    Code:
    #include<iostream>
    #include<vector>
    
    void passback(???);
    
    int main()
    {
       
      void passback(array???); 
       
       for(int i=0; i<array.size(); i++)
       {
          cout<<array[i];
        }
    
    }
    
    void passback(????)
    {
         vector <string> array;
        array.push_back("blah");
        array.push_back("yada");
        array.push_back("blah");
    
    }

  2. #2
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    main should pass a reference to the vector.

    Code:
    #include<iostream>
    #include<vector>
    
    void passback(std::vector<std::string>& s);
    
    int main()
    {
         std::vector <std::string> array;
       
         passback(array); 
       
       for(int i=0; i<array.size(); i++)
       {
          cout<<array[i];
        }
    
    }
    
    void passback(std::vector<std::string>& array)
    {
        array.push_back("blah");
        array.push_back("yada");
        array.push_back("blah");
    
    }

  3. #3
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    You can also just return it like any other type, although passing by reference is usually better since it avoids copynig everything in the vector.

  4. #4
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    Thanks

  5. #5
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    Or you can use a pointer (although you don't need to, and so a reference would be better).
    dwk

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