how to pass a structure vector to a function in C++?

Question

In the below example code I need to pass the structure vector to a function.

class A {
public:
    struct mystruct {   
        mystruct (int _label, double _dist) : label(_label), dist(_dist) {}   
        int label;
        double dist;
    };
}

I declared the vector as below:

 vector<A:: mystruct > mystry;

Now in this class "A" there is a function as below.

  myfunc ( vector<mystruct> &mystry );

How to pass the structure vector to my "myfunc"?

@nommyravian That question is about passing a vector and in my case its structure vector? — 2vision2, Apr 08 '13 at 04:40
That's the thing about vectors. It doesn't matter what they contain. — chris, Apr 08 '13 at 04:47
Where are you having problems? Passing a vector to a function is like passing anything else to a function. — juanchopanza, Apr 08 '13 at 05:43

score 4 · Accepted Answer · answered Apr 08 '13 at 04:49

4

Try this

#include <iostream>
#include <vector>

using namespace std;

class A {
public:
    struct mystruct {   
        mystruct (int _label, double _dist) : label(_label), dist(_dist) {}   
        int label;
        double dist;
    };

    void myfunc ( vector<mystruct> &mystry ){
        cout << mystry[0].label <<endl;
        cout << mystry[0].dist <<endl;
    }
};

int main(){
    A::mystruct temp_mystruct(5,2.5); \\create instance of struct.

    vector<A:: mystruct > mystry; \\ create vector of struct 
    mystry.push_back(temp_mystruct); \\ add struct instance to vector

    A a; \\ create instance of the class
    a.myfunc(mystry); \\call function
    system("pause");
    return 0;
}

answered Apr 08 '13 at 04:49

Nayana Adassuriya

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This seems excessively complicated. The OP only asked how to pass the vector to `myfunc`. – Michael Dorst Apr 08 '13 at 05:02
@MichaelDorst - 1. This is a working example so OP can debug and get the idea. 2. I commented the impotent points that OP need to understand and make the program understandable. 3. I don't see any complected in this simple program that mostly copied from OPs code. =) – Nayana Adassuriya Apr 08 '13 at 05:44

score 0 · Answer 2 · answered Apr 08 '13 at 04:46

0

Well, first you need to create an instance of A, like so:

A a;

Then, you need to call myfunc on a, passing it the value mystry.

a.myfunc(mystry);

answered Apr 08 '13 at 04:46

Michael Dorst

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how to pass a structure vector to a function in C++?

2 Answers2