How to replace data of some range std :: vector

Question

std::vector<char> v; v.push_back('a'); v.push_back('b'); v.push_back('c'); v.push_back('d'); v.push_back('e'); v.push_back('f'); char c[3] = { 'z', 'x', 'y' }; // Want to make abzxyf //v.insert(v.begin() + 2, c, c + 3); // it doesn't work as I wanted. // Yes it works. but if c is more bigger, it will be crash. std::copy(c, c + 3, v.begin() + 2); v.clear(); v.push_back('a'); v.push_back('b'); v.push_back('c'); v.push_back('d'); v.push_back('e'); v.push_back('f'); // If vector needs more memory, I'd let him grow automactically // So I tried this.(expected abcdezxy) // But it result is abcdezxyf. f is still remain. std::copy(c, c + 3, std::inserter(v, v.begin() + 5)); 

Which algorithm or method should be used?

Answer 1

If sizeof(c) larger, resize() to copy() , which should do the trick.

eg.

 if (sizeof(c) + 2 > v.size()) v.resize(sizeof(c) + 2); // now copy std::copy(c, c + sizeof(c), v.begin() + 2); 

Answer 2

If you want to do text processing, you can use std::string , which has replace functions.

std::vector no. You must use the appropriate combination of rewriting elements in combination with insert and erase .