how to allocate memory for vector c 2b 2b

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Immy
12 May 2017
1std::vector<int> vec1;
2vec1.reserve(30);  // Allocate space for 30 items, but vec1 is still empty.
3
4std::vector<int> vec2;
5vec2.resize(30);  // Allocate space for 30 items, and vec2 now contains 30 items.
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