Insert properties into last element in a vector [closed]

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EDIT Sorry! This code actually works correctly; I was looking at the wrong error. Thanks to everyone for their input.

I want to be able to directly access the last element of a vector<> in C++. Currently, I push_back() a temporary variable (of a custom开发者_开发知识库 type), however I'd much rather put data straight into the vector. The following code is an example of what I'd like to do. It won't compile, but it does a better job of explaining than I do:

typedef struct
{
    float colour[3];
}
CustomType

vector<CustomType> customArray;

customArray.push_back(CustomType());

// The hard part - won't work
customArray.back().colour[0] = 1;

I'd like some help with the last line; what's the correct syntax to put data into the most-recently pushed back element in a vector?

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Why won't

customArray.back().colour[0] = 1;

work?

It does work! Try again :)

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back() returns a reference to the last item of the vector, your code is correct apart from a small syntax error.

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customArray.size() - 1 is the index of the last item that was added to the vector

customArray[customArray.size()-1].color[0]=1 should work.

[As Oli and interjay et al have commented, the back() method will work if you correct the syntax error]

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Do you mean something like this:

// Construct vector with `NUM_ELEMENTS` entries
vector<CustomType> customArray(NUM_ELEMENTS);

// Now you can access them directly
customArray[0].colour[0] = 1;