\n| \u6784\u9020\u51fd\u6570\u58f0\u660e<\/td>\n | \n \u63a5\u53e3\u8bf4\u660e<\/span>\n <\/td>\n<\/tr>\n\n| \n vector()<\/span>\n <\/td>\n | \u65e0\u53c2\u6784\u9020<\/td>\n<\/tr>\n | \n| \n vector<\/span>
\n （<\/span>
\n size_type n, const value_type& val = <\/span><\/p>\n value_type()<\/span>
\n ）<\/span>\n <\/td>\n | \u6784\u9020\u5e76\u521d\u59cb\u5316n\u4e2aval<\/td>\n<\/tr>\n | \n| \n vector (const vector& x)<\/span>\n <\/td>\n | \u62f7\u8d1d\u6784\u9020<\/td>\n<\/tr>\n | \n| \n vector (InputIterator first, InputIterator last)<\/span>\n <\/td>\n | \u4f20\u5165\u8fed\u4ee3\u5668\u53bb\u8fdb\u884c\u521d\u59cb\u5316<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u4e14\u5728\u53d8\u91cf\u540d\u4e4b\u524d\u9700\u8981\u52a0\u4e0a\u6570\u636e\u7c7b\u578b\u3002<\/p>\n #include<iostream>
\n#include<vector>
\nusing namespace std;<\/p>\n int main() {
\nvector<int> v1;
\nvector<int> v2(6, 3);
\nvector<int> v3(v2);
\nvector<int> v4(v2.begin(), v2.end());
\n} <\/p>\n \u4e09\u3001vector\u7684\u8fed\u4ee3\u5668\u548c\u8303\u56f4for\u904d\u5386<\/h2>\n\u8fed\u4ee3\u5668\u63a5\u53e3：<\/p>\n \n\n\n| \u63a5\u53e3<\/td>\n | \u63a5\u53e3\u8bf4\u660e<\/td>\n<\/tr>\n | \n| begin+end<\/td>\n | \n \u83b7\u53d6\u7b2c\u4e00\u4e2a\u6570\u636e\u4f4d\u7f6e\u7684<\/span>
\n iterator\/const_iterator<\/span>
\n ， \u83b7\u53d6\u6700\u540e\u4e00\u4e2a\u6570\u636e\u7684\u4e0b <\/span><\/p>\n \u4e00\u4e2a\u4f4d\u7f6e\u7684<\/span>
\n iterator\/const_iterator<\/span>\n <\/td>\n<\/tr>\n\n| rbegin+rend<\/td>\n | \n \u83b7\u53d6\u6700\u540e\u4e00\u4e2a\u6570\u636e\u4f4d\u7f6e\u7684<\/span>
\n reverse_iterator<\/span>
\n ，\u83b7\u53d6\u7b2c\u4e00\u4e2a\u6570\u636e\u524d\u4e00\u4e2a\u4f4d\u7f6e <\/span><\/p>\n \u7684<\/span>
\n reverse_iterator<\/span>\n <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\u548c string \u7684\u8fed\u4ee3\u5668\u4f7f\u7528\u7c7b\u4f3c：<\/p>\n vector<int> v1(5, 4);
\nvector<int>::iterator it = v1.begin();
\nwhile (it != v1.end()) {
\ncout << *it << " ";
\n++it;
\n}
\ncout << endl; <\/p>\n \u6216\u8005\u4f7f\u7528 auto \u81ea\u52a8\u8bc6\u522b\u7c7b\u578b：<\/p>\n vector<int> v1(5, 4);
\nauto it = v1.begin();
\nwhile (it != v1.end()) {
\ncout << *it << " ";
\n++it;
\n}
\ncout << endl; <\/p>\n \u8303\u56f4for\u904d\u5386：<\/p>\n vector<int> v1(5, 4);
\nauto it = v1.begin();
\nfor (auto& e : v1) {
\ncout << e << " ";
\n}
\ncout << endl; <\/p>\n \u56db\u3001vector\u7684\u5bb9\u91cf\u95ee\u9898<\/h2>\n\u63a5\u53e3：<\/p>\n \n\n\n| \n \u5bb9\u91cf\u7a7a\u95f4<\/span>\n <\/td>\n | \n \u63a5\u53e3\u8bf4\u660e<\/span>\n <\/td>\n<\/tr>\n\n| size<\/td>\n | \u83b7\u53d6\u6570\u636e\u4e2a\u6570<\/td>\n<\/tr>\n | \n| capacity<\/td>\n | \u83b7\u53d6\u5bb9\u91cf<\/td>\n<\/tr>\n | \n| empty<\/td>\n | \u5224\u65ad\u662f\u5426\u4e3a\u7a7a<\/td>\n<\/tr>\n | \n| resize<\/td>\n | \n \u6539\u53d8<\/span>
\n vector<\/span>
\n \u7684<\/span>
\n size<\/span>\n <\/td>\n<\/tr>\n\n| reserve<\/td>\n | \n \u6539\u53d8<\/span>
\n vector<\/span>
\n \u7684<\/span>
\n capacity<\/span>\n <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nvector\u7684\u5185\u5b58\u6269\u5bb9\u548c\u73af\u5883\u6709\u5173，vs<\/span>\u4e0b<\/span>capacity<\/span>\u662f\u6309<\/span>1.5<\/span>\u500d\u589e\u957f\u7684，<\/span>g++<\/span>\u662f\u6309<\/span>2<\/span>\u500d\u589e\u957f\u7684，<\/span>\u4e0d\u8981\u56fa\u5316\u7684<\/span><\/p>\n\u8ba4\u4e3a，<\/span>vector<\/span>\u589e\u5bb9\u90fd\u662f<\/span>2<\/span>\u500d，\u5177\u4f53\u589e\u957f\u591a\u5c11\u662f\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u5b9a\u4e49\u7684\u3002<\/span><\/p>\nreserve \u53ea\u8d1f\u8d23\u5f00\u8f9f\u7a7a\u95f4\u3002\u5982\u679c\u786e\u5b9a\u77e5\u9053\u9700\u8981\u7528\u591a\u5c11\u7a7a\u95f4，\u63d0\u524d\u8c03\u7528 reserve \u53ef\u4ee5\u7f13\u89e3 vector \u589e\u5bb9\u5e26\u6765\u7684\u4ee3\u4ef7\u7f3a\u9677，\u907f\u514d\u56e0\u7a7a\u95f4\u4e0d\u8db3\u800c\u53cd\u590d\u6269\u5bb9\u5bfc\u81f4\u6548\u7387\u53d8\u4f4e\u3002<\/span><\/p>\n\u4e94\u3001vector\u5bb9\u5668\u7684\u5e38\u7528\u63a5\u53e3<\/span><\/h2>\n\n\n\n| \n vector<\/span>
\n \u589e\u5220\u67e5\u6539<\/span>\n <\/td>\n | \n \u63a5\u53e3\u8bf4\u660e<\/span>\n <\/td>\n<\/tr>\n\n| \n push_back()<\/span>\n <\/td>\n | \n \u5c3e\u63d2<\/span>\n <\/td>\n<\/tr>\n\n| \n pop_back()<\/span>\n <\/td>\n | \n \u5c3e\u5220<\/span>\n <\/td>\n<\/tr>\n\n| \n find<\/span>\n <\/td>\n | \n \u67e5\u627e\u3002（\u6ce8\u610f\u8fd9\u4e2a\u662f\u7b97\u6cd5\u6a21\u5757\u5b9e\u73b0，\u4e0d\u662f<\/span>
\n vector<\/span>
\n \u7684\u6210\u5458\u63a5\u53e3）<\/span>\n <\/td>\n<\/tr>\n\n| \n insert<\/span>\n <\/td>\n | \n \u5728<\/span>
\n position<\/span>
\n \u4e4b\u524d\u63d2\u5165<\/span>
\n val<\/span>\n <\/td>\n<\/tr>\n\n| \n erase<\/span>\n <\/td>\n | \n \u5220\u9664<\/span>
\n position<\/span>
\n \u4f4d\u7f6e\u7684\u6570\u636e<\/span>\n <\/td>\n<\/tr>\n\n| \n swap<\/span>\n <\/td>\n | \n \u4ea4\u6362\u4e24\u4e2a<\/span>
\n vector<\/span>
\n \u7684\u6570\u636e\u7a7a\u95f4<\/span>\n <\/td>\n<\/tr>\n\n| \n operator[]<\/span>\n <\/td>\n | \n \u50cf\u6570\u7ec4\u4e00\u6837\u8bbf\u95ee<\/span>\n <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\u5176\u4e2d\u548cstring\u4e0d\u4e00\u6837\u7684\u662f，vector\u6ca1\u6709\u81ea\u5df1\u7684\u6210\u5458\u51fd\u6570.find()，\u800c\u662f<algorithm>\u4e2d\u7684\u6cdb\u578b\u7b97\u6cd5，vector \u672c\u8eab\u6ca1\u6709 .find() \u6210\u5458\u3002<\/p>\n \u8be6\u7ec6\u7684\u63a5\u53e3\u4f7f\u7528\u5728：https:\/\/cplusplus.com\/reference\/vector\/vector\/<\/p>\n \u516d\u3001vector\u7684\u8fed\u4ee3\u5668\u5931\u6548\u95ee\u9898<\/h2>\n\u5728 C \u8bed\u8a00\u7684\u5185\u5b58\u64cd\u4f5c\u51fd\u6570\u4e2d，\u4f7f\u7528 malloc \u7533\u8bf7\u5185\u5b58\u540e，\u4f1a\u9047\u5230\u7a7a\u95f4\u4e0d\u591f\u7684\u60c5\u51b5，\u8fd9\u65f6\u5c31\u4f1a\u4f7f\u7528 realloc \u53bb\u6269\u5bb9，\u800c\u6269\u5bb9\u51fd\u6570\u7684\u7b56\u7565\u662f，\u5982\u679c\u5185\u5b58\u5269\u4e0b\u7684\u7a7a\u95f4\u8fd8\u662f\u4e0d\u591f，\u5c31\u4f1a\u5728\u5806\u4e0a\u91cd\u65b0\u5f00\u8f9f\u65b0\u7a7a\u95f4，\u518d\u628a\u65b0\u7a7a\u95f4\u8fd4\u56de，\u4ece\u800c\u6210\u529f\u6269\u5bb9\u3002<\/p>\n \u4f46\u662f\u5bf9\u4e8e\u8fed\u4ee3\u5668，\u5176\u5e95\u5c42\u5c31\u662f\u4e00\u4e2a\u6307\u9488，\u800c\u8fed\u4ee3\u5668\u5931\u6548，\u5b9e\u9645\u5c31\u662f\u8fed\u4ee3\u5668\u539f\u672c\u6307\u5411\u7684\u533a\u57df\u88ab\u91ca\u653e，\u800c\u6307\u9488\u6307\u5411\u4e00\u4e2a\u88ab\u91ca\u653e\u7684\u7a7a\u95f4，\u5c31\u4f1a\u4f7f\u7a0b\u5e8f\u5d29\u6e83\u3002<\/p>\n \u6211\u4eec\u770b\u4e00\u4e0b vector \u4e2d\u7684\u63a5\u53e3，push_back\u3001insert\u3001resize\u3001reserve\u3001assign \u90fd\u662f\u80fd\u591f\u5f15\u8d77 vector \u5927\u5c0f\u53d8\u5316\u7684\u51fd\u6570，\u4ece\u800c\u5c31\u53ef\u80fd\u5bfc\u81f4\u5e95\u5c42\u7a7a\u95f4\u7684\u6539\u53d8，\u4f7f\u8fed\u4ee3\u5668\u5931\u6548\u3002\u5982：<\/p>\n #include<iostream>
\n#include<vector>
\nusing namespace std;<\/p>\n int main() {
\nvector<int> v1(5, 4);
\nauto it = v1.begin();
\n\/\/ \u5c06\u6709\u6548\u5143\u7d20\u4e2a\u6570\u589e\u52a0\u5230100\u4e2a，\u591a\u51fa\u7684\u4f4d\u7f6e\u4f7f\u75288\u586b\u5145，\u64cd\u4f5c\u671f\u95f4\u5e95\u5c42\u4f1a\u6269\u5bb9
\n\/\/ v.resize(100, 8);
\n\/\/ reserve\u7684\u4f5c\u7528\u5c31\u662f\u6539\u53d8\u6269\u5bb9\u5927\u5c0f\u4f46\u4e0d\u6539\u53d8\u6709\u6548\u5143\u7d20\u4e2a\u6570，\u64cd\u4f5c\u671f\u95f4\u53ef\u80fd\u4f1a\u5f15\u8d77\u5e95\u5c42\u5bb9
\n\/\/\u91cf\u6539\u53d8
\n\/\/ v.reserve(100);
\n\/\/ \u63d2\u5165\u5143\u7d20\u671f\u95f4，\u53ef\u80fd\u4f1a\u5f15\u8d77\u6269\u5bb9，\u800c\u5bfc\u81f4\u539f\u7a7a\u95f4\u88ab\u91ca\u653e
\n\/\/ v.insert(v.begin(), 0);
\n \/\/ v.push_back(8);
\n \/\/ \u7ed9vector\u91cd\u65b0\u8d4b\u503c，\u53ef\u80fd\u4f1a\u5f15\u8d77\u5e95\u5c42\u5bb9\u91cf\u6539\u53d8
\nv1.assign(100, 8);
\nwhile (it != v1.end()) {
\ncout << *it << " ";
\n++it;
\n}
\ncout << endl;
\n} <\/p>\n \u7279\u6b8a\u7684\u8bbf\u95ee\u5931\u8d25：\u6570\u7ec4\u7684\u5220\u9664\u64cd\u4f5c\u2014\u2014erase<\/p>\n #include <iostream>
\nusing namespace std;
\n#include <vector>
\nint main()
\n{
\n int a[] = { 1, 2, 3, 4 };
\n vector<int> v(a, a + sizeof(a) \/ sizeof(int));
\n \/\/ \u4f7f\u7528find\u67e5\u627e3\u6240\u5728\u4f4d\u7f6e\u7684iterator
\n vector<int>::iterator pos = find(v.begin(), v.end(), 3);
\n \/\/ \u5220\u9664pos\u4f4d\u7f6e\u7684\u6570\u636e，\u5bfc\u81f4pos\u8fed\u4ee3\u5668\u5931\u6548\u3002
\n v.erase(pos);
\n cout << *pos << endl; \/\/ \u6b64\u5904\u4f1a\u5bfc\u81f4\u975e\u6cd5\u8bbf\u95ee
\n return 0;
\n} <\/p>\n \u5728erase\u5220\u9664\u64cd\u4f5c\u4e2d，\u5220\u9664\u540epos\u4e4b\u540e\u7684\u4f4d\u7f6e\u4f1a\u5f80\u524d\u79fb，\u4f46\u5982\u679cpos\u6070\u597d\u662f\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e，\u90a3\u4e48\u8fd4\u56de\u7684\u5c31\u662fend\u7684\u4f4d\u7f6e，\u800cend\u4f4d\u7f6e\u662f\u6ca1\u6709\u6570\u636e\u7684，\u8fd9\u5c31\u4f1a\u5bfc\u81f4\u8fed\u4ee3\u5668\u5931\u6548\u3002<\/p>\n \u9700\u8981\u6ce8\u610f\u7684\u662f，string\u7ecf\u8fc7\u6269\u5bb9\u540e\u4e5f\u53ef\u80fd\u4f1a\u51fa\u73b0\u8fed\u4ee3\u5668\u5931\u6548\u7684\u95ee\u9898\u3002<\/span><\/p>\n\u4e03\u3001\u52a8\u6001\u4e8c\u7ef4\u6570\u7ec4\u7684\u7406\u89e3<\/h2>\n\u5728\u4f7f\u7528vector\u65f6，\u6211\u4eec\u4f1a\u5b9a\u4e49vector\u4e2d\u7684\u6570\u636e\u7c7b\u578b，\u4f46\u5982\u679c\u6211\u4eec\u5c06\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e3avector <int> \u5462？<\/p>\n \u7b49\u4e8e\u662f\u5c06\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u6570\u636e\u8bbe\u5b9a\u4e3a\u53e6\u4e00\u4e2a\u6570\u7ec4，\u8fd9\u6837\u6211\u4eec\u5c31\u5f97\u5230\u4e86\u52a8\u6001\u4e8c\u7ef4\u6570\u7ec4\u3002<\/p>\n \u6211\u4eec\u4ee5\u6768\u8f89\u4e09\u89d2\u4e3a\u4f8b：<\/p>\n void test2vector(size_t n)
\n{
\n \/\/ \u4f7f\u7528vector\u5b9a\u4e49\u4e8c\u7ef4\u6570\u7ec4vv，vv\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u662fvector<int>
\n bit::vector<bit::vector<int>> vv(n);
\n \/\/ \u5c06\u4e8c\u7ef4\u6570\u7ec4\u6bcf\u4e00\u884c\u4e2d\u7684vector<int>\u4e2d\u7684\u5143\u7d20\u5168\u90e8\u8bbe\u7f6e\u4e3a1
\n for (size_t i = 0; i < n; ++i)
\n vv[i].resize(i + 1, 1);
\n \/\/ \u7ed9\u6768\u8f89\u4e09\u89d2\u51fa\u7b2c\u4e00\u5217\u548c\u5bf9\u89d2\u7ebf\u7684\u6240\u6709\u5143\u7d20\u8d4b\u503c
\n for (int i = 2; i < n; ++i)
\n {
\n for (int j = 1; j < i; ++j)
\n {
\n vv[i][j] = vv[i – 1][j] + vv[i – 1][j – 1];
\n }
\n }
\n} <\/p>\n bit::vector<bit::vector<int>> vv(n)<\/span>
\n ; <\/span>
\n \u6784\u9020\u4e00\u4e2a<\/span>
\n vv<\/span>
\n \u52a8\u6001\u4e8c\u7ef4\u6570\u7ec4，<\/span>
\n vv<\/span>
\n \u4e2d\u603b\u5171\u6709<\/span>
\n n<\/span>
\n \u4e2a\u5143\u7d20，\u6bcf\u4e2a\u5143\u7d20<\/span><\/p>\n \u90fd\u662f<\/span>
\n vector<\/span>
\n \u7c7b\u578b\u7684，\u6bcf\u884c\u6ca1\u6709\u5305\u542b\u4efb\u4f55\u5143\u7d20\u3002<\/span><\/p>\n \u5047\u8bbe n=5，\u90a3\u4e48\u5185\u90e8\u5c31\u662f\u8fd9\u6837\u7684：<\/span><\/p>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260905163257-6a9c4439da015.jpg\") <\/p>\n","protected":false},"excerpt":{"rendered":" \u6458\u8981：\u672c\u6587\u7cfb\u7edf\u4ecb\u7ecd C \u6807\u51c6\u5e93\u4e2d std::vector \u52a8\u6001\u6570\u7ec4\u7684\u6838\u5fc3\u7528\u6cd5，\u6db5\u76d6\u5176\u57fa\u672c\u6982\u5ff5\u4e0e\u5185\u5b58\u7ed3\u6784\u3001\u5e38\u7528\u6784\u9020\u51fd\u6570\u3001\u8fed\u4ee3\u5668\u4e0e\u8303\u56f4 for \u904d\u5386\u65b9\u5f0f\u3001\u5bb9\u91cf\u7ba1\u7406\u63a5\u53e3\u3001\u589e\u5220\u67e5\u6539\u7b49\u5e38\u7528\u64cd\u4f5c，\u5e76\u91cd\u70b9\u5206\u6790\u8fed\u4ee3\u5668\u5931\u6548\u7684\u6210\u56e0\u4e0e\u6ce8\u610f\u4e8b\u9879，\u6700\u540e\u901a\u8fc7\u6768\u8f89\u4e09\u89d2\u793a\u4f8b\u5e2e\u52a9\u7406\u89e3\u52a8\u6001\u4e8c\u7ef4\u6570\u7ec4\u7684\u6784\u9020\u4e0e\u4f7f\u7528\u3002
\n\u4e00\u3001vector\u7684\u4ecb\u7ecd
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