{"id":40926,"date":"2025-05-30T12:26:41","date_gmt":"2025-05-30T04:26:41","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/40926.html"},"modified":"2025-05-30T12:26:41","modified_gmt":"2025-05-30T04:26:41","slug":"%e3%80%90c%e6%8c%87%e5%8d%97%e3%80%91stl%e5%ae%b9%e5%99%a8%e7%9a%84%e5%ae%89%e5%85%a8%e9%9d%a9%e5%91%bd%ef%bc%9a%e5%a6%82%e4%bd%95%e5%b0%81%e8%a3%85vector%e6%9d%9c%e7%bb%9d%e8%b6%8a%e7%95%8c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/40926.html","title":{"rendered":"\u3010C++\u6307\u5357\u3011STL\u5bb9\u5668\u7684\u5b89\u5168\u9769\u547d\uff1a\u5982\u4f55\u5c01\u88c5Vector\u675c\u7edd\u8d8a\u754c\u8bbf\u95ee\u4e0e\u8fed\u4ee3\u5668\u5931\u6548\uff1f"},"content":{"rendered":"

\"\"<\/p>\n

🌟\u00a0\u5404\u4f4d\u770b\u5b98\u597d<\/span>，\u6211\u662fegoist2023！<\/p>\n

🌍\u00a0\u79cd\u4e00\u68f5\u6811\u6700\u597d\u662f\u5341\u5e74\u524d，\u5176\u6b21\u662f\u73b0\u5728！<\/p>\n

🚀\u00a0\u4f7f\u7528STL\u7684\u4e09\u4e2a\u5883\u754c：\u80fd\u7528，\u660e\u7406，\u80fd\u6269\u5c55<\/span><\/p>\n

👍\u00a0\u5982\u679c\u89c9\u5f97\u8fd9\u7bc7\u6587\u7ae0\u6709\u5e2e\u52a9，\u6b22\u8fce\u60a8\u4e00\u952e\u4e09\u8fde，\u5206\u4eab\u7ed9\u66f4\u591a\u4eba\u54e6！<\/span><\/p>\n

\u4e86\u89e3vector\u5e38\u7528\u63a5\u53e3<\/h2>\n

vector\u662fC++\u6807\u51c6\u6a21\u677f\u5e93\u4e2d\u7684\u90e8\u5206\u5185\u5bb9，\u4e2d\u6587\u5076\u5c14\u8bd1\u4f5c\u201c\u5bb9\u5668\u201d，\u4f46\u5e76\u4e0d\u51c6\u786e\u3002\u5b83\u662f\u4e00\u4e2a\u591a\u529f\u80fd\u7684，\u80fd\u591f\u64cd\u4f5c\u591a\u79cd\u6570\u636e\u7ed3\u6784\u548c\u7b97\u6cd5\u7684\u6a21\u677f\u7c7b\u548c\u51fd\u6570\u5e93<\/span>\u3002vector\u4e4b\u6240\u4ee5\u88ab\u8ba4\u4e3a\u662f\u4e00\u4e2a\u5bb9\u5668，\u662f\u56e0\u4e3a\u5b83\u80fd\u591f\u50cf\u5bb9\u5668\u4e00\u6837\u5b58\u653e\u5404\u79cd\u7c7b\u578b\u7684\u5bf9\u8c61<\/span>，\u7b80\u5355\u5730\u8bf4，vector\u662f\u4e00\u4e2a\u80fd\u591f\u5b58\u653e\u4efb\u610f\u7c7b\u578b\u7684\u52a8\u6001\u6570\u7ec4<\/span>，\u80fd\u591f\u589e\u52a0\u548c\u538b\u7f29\u6570\u636e\u3002<\/p>\n

\u5e38\u89c1\u6784\u9020<\/h3>\n\n\n\n\n\n\n\n
\n

(constructor)<\/span>
\n \u6784\u9020\u51fd\u6570\u58f0\u660e<\/span>\n <\/td>\n

\u63a5\u53e3\u8bf4\u660e<\/span><\/td>\n<\/tr>\n
\n

vector()<\/span>
\n （\u91cd\u70b9）<\/span>\n <\/td>\n

\u65e0\u53c2\u6784\u9020<\/span><\/td>\n<\/tr>\n
\n

vector<\/span>
\n （<\/span>
\n size_type n, const value_type& val = value_type()）<\/span>\n <\/td>\n

\n

\u6784\u9020\u5e76\u521d\u59cb\u5316<\/span>
\n n<\/span>
\n \u4e2a<\/span>
\n val<\/span>\n <\/td>\n<\/tr>\n

\n

vector (const vector& x); （\u91cd\u70b9）<\/span>\n <\/td>\n

\n

\u62f7\u8d1d\u6784\u9020<\/span>\n <\/td>\n<\/tr>\n

\n

vector (InputIterator first, InputIterator last);<\/span>\n <\/td>\n

\n

\u4f7f\u7528\u8fed\u4ee3\u5668\u8fdb\u884c\u521d\u59cb\u5316\u6784\u9020<\/span>\n <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8fed\u4ee3\u5668\u00a0<\/h3>\n\n\n\n\n\n
\n

iterator<\/span>
\n \u7684\u4f7f<\/span>
\n \u7528<\/span>\n <\/td>\n

\n

\u63a5\u53e3\u8bf4\u660e<\/span>\n <\/td>\n<\/tr>\n

\n

begin <\/span>
\n + <\/span>
\n end<\/span>
\n （\u91cd\u70b9）<\/span>\n <\/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 <\/span>
\n +\u00a0<\/span>
\n rend<\/span>\n <\/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\u7684reverse_iterator<\/span>\n <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5bb9\u91cf\u64cd\u4f5c\u00a0<\/h3>\n\n\n\n\n\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<\/span>\n <\/td>\n

\n

\u83b7\u53d6\u6570\u636e\u4e2a\u6570<\/span>\n <\/td>\n<\/tr>\n

\n

capacity<\/span>\n <\/td>\n

\n

\u83b7\u53d6\u5bb9\u91cf\u5927\u5c0f<\/span>\n <\/td>\n<\/tr>\n

\n

empty<\/span>\n <\/td>\n

\n

\u5224\u65ad\u662f\u5426\u4e3a\u7a7a<\/span>\n <\/td>\n<\/tr>\n

\n

resize<\/span>
\n （\u91cd\u70b9）<\/span>\n <\/td>\n

\n

\u6539\u53d8<\/span>
\n vector<\/span>
\n \u7684<\/span>
\n size<\/span>\n <\/td>\n<\/tr>\n

\n

reserve <\/span>
\n （\u91cd\u70b9）<\/span>\n <\/td>\n

\n

\u6539\u53d8<\/span>
\n vector<\/span>
\n \u7684<\/span>
\n capacity<\/span>\n <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4fee\u6539\u64cd\u4f5c<\/h3>\n\n\n\n\n\n\n\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

push_back<\/span>
\n （\u91cd\u70b9）<\/span>\n <\/td>\n

\n

\u5c3e\u63d2<\/span>\n <\/td>\n<\/tr>\n

\n

pop_back <\/span>
\n （\u91cd\u70b9）<\/span>\n <\/td>\n

\n

\u5c3e\u5220<\/span>\n <\/td>\n<\/tr>\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

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

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

swap<\/span>\n <\/td>\n

\n

\u4ea4\u6362\u4e24\u4e2a<\/span>
\n vector\u7684\u6570\u636e\u7a7a\u95f4<\/span>\n <\/td>\n<\/tr>\n

\n

operator[] <\/span>
\n （\u91cd\u70b9）<\/span>\n <\/td>\n

\n

\u50cf\u6570\u7ec4\u4e00\u6837\u8bbf\u95ee<\/span>\n <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n

vector\u5b9e\u73b0<\/h2>\n

\u5e95\u5c42\u7ed3\u6784<\/h3>\n

\u5728C\u8bed\u8a00\u5b9e\u73b0\u5f53\u4e2d，vector\u5b9e\u73b0\u4e2d\u5e76\u6ca1\u6709\u8fed\u4ee3\u5668\u7684\u652f\u6301，\u56e0\u6b64\u5e95\u5c42\u7ed3\u6784\u8bbe\u8ba1\u5e76\u4e0d\u590d\u6742\u3002<\/p>\n

typedef struct SeqList
\n{
\nSLDataType* arr;
\nint size;\/\/\u6709\u6548\u6570\u636e\u4e2a\u6570
\nint capacity;\/\/\u7a7a\u95f4\u5927\u5c0f
\n}SL; <\/p>\n

\u4e3a\u4e86\u63d0\u4f9b\u8fed\u4ee3\u5668\u7684\u652f\u6301，\u53ef\u4ee5\u50cf\u6307\u9488\u4e00\u6837\u904d\u5386\u6570\u7ec4，\u56e0\u6b64\u5bf9vector\u7684\u5e95\u5c42\u5c01\u88c5\u91c7\u7528\u5982\u4e0b\u3002<\/span><\/p>\n

template<class T><\/p>\n

class vector
\n{
\npublic:
\n typedef T* iterator;
\ntypedef const T* const_iterator;
\n \/\/…<\/p>\n

private:
\n\/\/\u7ed9\u7f3a\u7701\u503c
\niterator _start = nullptr;
\niterator _finish = nullptr;
\niterator _end_of_storage = nullptr;
\n}; <\/p>\n

\u8fed\u4ee3\u5668<\/h3>\n

iterator begin()
\n{
\nreturn _start;
\n}<\/p>\n

iterator end()
\n{
\nreturn _finish;
\n}<\/p>\n

const_iterator begin() const
\n{
\nreturn _start;
\n}<\/p>\n

const_iterator end() const
\n{
\nreturn _finish;
\n} <\/p>\n

\"\"<\/p>\n<\/p>\n

\"\"<\/p>\n

\n

memcpy\u62f7\u8d1d\u95ee\u9898<\/h3>\n

void reserve(size_t n)
\n{
\nif (n > capacity())
\n{
\nsize_t oldsize = size();
\nT* tmp = new T[n];
\nmemcpy(tmp, _start, sizeof(T) * oldsize);
\ndelete[] _start;<\/p>\n

_start = tmp;
\n_finish = _start + oldsize;
\n_end_of_storage = _start + n;
\n}
\n} <\/p>\n

\u5b9e\u9645\u4e0a，\u4e0a\u9762\u8fd9\u6bb5\u7a0b\u5e8f\u5728\u5185\u7f6e\u7c7b\u578b\u662f\u4e0d\u4f1a\u51fa\u95ee\u9898\u7684，\u4f46\u662f\u9488\u5bf9\u4e00\u4e9b\u573a\u666f（\u5982\u81ea\u5b9a\u4e49\u7c7b\u578b）\u4f1a\u62a5\u9519，\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/p>\n

\"\"<\/p>\n

\u5982\u679cvector\u4e2d\u5b58\u7684\u662f\u81ea\u5b9a\u4e49\u7c7b\u578b<\/p>\n

\u95ee\u98981：\u4f1a\u5bfc\u81f4\u591a\u6b21\u6790\u6784；<\/span><\/p>\n

\u95ee\u98982：\u4e00\u4e2a\u6570\u636e\u7684\u4fee\u6539\u4f1a\u5f71\u54cd\u53e6\u4e00\u4e2a \u3002<\/span><\/p>\n

\u95ee\u98983：memcpy\u5219\u53ea\u80fd\u62f7\u8d1d\u6bcf\u4e2astring,\u4f46\u8fd8\u662f\u540c\u6837\u6307\u5411\u540c\u4e00\u4e2a\u4e32\u3002<\/span><\/p>\n

\u4e3a\u4e86\u9632\u6b62\u6d45\u62f7\u8d1d\u95ee\u9898，\u5982\u4e0b\u7a0b\u5e8f\u662f\u9488\u5bf9\u81ea\u5b9a\u4e49\u7c7b\u578b\u7684\u4f18\u5316\u3002<\/p>\n

void reserve(size_t n)
\n{
\nif (n > capacity())
\n{
\nsize_t oldsize = size();
\nT* tmp = new T[n];
\n\/\/memcpy(tmp, _start, sizeof(T) * oldsize); \/\/err\u53ea\u80fd\u9488\u5bf9\u5185\u7f6e\u7c7b\u578b<\/p>\n

for (size_t i = 0;i < oldsize;++i)
\n{
\ntmp[i] = _start[i];
\n\/\/\u5185\u7f6e\u7c7b\u578b\u4e0d\u4f1a\u6709\u95ee\u9898
\n\/\/\u81ea\u5b9a\u4e49\u7c7b\u578b\u8c03\u7528\u5176=\u8fd0\u7b97\u7b26\u91cd\u8f7d\u51fd\u6570\u8d70\u6df1\u62f7\u8d1d,\u9632\u6b62memcpy\u51fa\u73b0\u7684\u95ee\u9898
\n}
\ndelete[] _start;<\/p>\n

_start = tmp;
\n_finish = _start + oldsize;
\n_end_of_storage = _start + n;
\n}
\n} <\/p>\n

\u7ed3\u8bba：\u5982\u679c\u5bf9\u8c61\u4e2d\u6d89\u53ca\u5230\u8d44\u6e90\u7ba1\u7406\u65f6，\u5343\u4e07\u4e0d\u80fd\u4f7f\u7528memcpy\u8fdb\u884c\u5bf9\u8c61\u4e4b\u95f4\u7684\u62f7\u8d1d，\u56e0\u4e3a <\/span> <\/p>\n

memcpy\u662f\u6d45\u62f7\u8d1d，\u5426\u5219\u53ef\u80fd\u4f1a\u5f15\u8d77\u5185\u5b58\u6cc4\u6f0f\u751a\u81f3\u7a0b\u5e8f\u5d29\u6e83\u3002<\/span> <\/p>\n

\n

\u8fed\u4ee3\u5668\u5931\u6548\u95ee\u9898<\/h3>\n

\u8fed\u4ee3\u5668\u7684\u4e3b\u8981\u4f5c\u7528\u5c31\u662f\u8ba9\u7b97\u6cd5\u80fd\u591f\u4e0d\u7528\u5173\u5fc3\u5e95\u5c42\u6570\u636e\u7ed3\u6784，\u5176\u5e95\u5c42\u5b9e\u9645\u5c31\u662f\u4e00\u4e2a\u6307\u9488，\u6216\u8005\u662f\u5bf9 <\/span> <\/p>\n

\u6307\u9488\u8fdb\u884c\u4e86\u5c01\u88c5<\/span>
\n ，\u6bd4\u5982：<\/span>
\n vector<\/span>
\n \u7684\u8fed\u4ee3\u5668\u5c31\u662f\u539f\u751f\u6001\u6307\u9488<\/span>
\n T* <\/span>
\n \u3002\u56e0\u6b64<\/span>
\n \u8fed\u4ee3\u5668\u5931\u6548，\u5b9e\u9645\u5c31\u662f\u8fed\u4ee3\u5668 <\/span> <\/p>\n

\u5e95\u5c42\u5bf9\u5e94\u6307\u9488\u6240\u6307\u5411\u7684\u7a7a\u95f4\u88ab\u9500\u6bc1\u4e86，\u800c\u4f7f\u7528\u4e00\u5757\u5df2\u7ecf\u88ab\u91ca\u653e\u7684\u7a7a\u95f4<\/span>
\n ，\u9020\u6210\u7684\u540e\u679c\u662f\u7a0b\u5e8f\u5d29\u6e83<\/span>
\n (<\/span>
\n \u5373 <\/span> <\/p>\n

\u5982\u679c\u7ee7\u7eed\u4f7f\u7528\u5df2\u7ecf\u5931\u6548\u7684\u8fed\u4ee3\u5668，\u7a0b\u5e8f\u53ef\u80fd\u4f1a\u5d29\u6e83<\/span>
\n )<\/span>
\n \u3002 <\/span> <\/p>\n

\u5bf9\u4e8e<\/span>
\n vector<\/span>
\n \u53ef\u80fd\u4f1a\u5bfc\u81f4\u5176\u8fed\u4ee3\u5668\u5931\u6548\u7684\u64cd\u4f5c\u6709： <\/span> <\/p>\n

1. <\/span>
\n \u4f1a\u5f15\u8d77\u5176\u5e95\u5c42\u7a7a\u95f4\u6539\u53d8\u7684\u64cd\u4f5c，\u90fd\u6709\u53ef\u80fd\u662f\u8fed\u4ee3\u5668\u5931\u6548<\/span>
\n ，\u6bd4\u5982：<\/span>
\n resize<\/span>
\n \u3001<\/span>
\n reserve<\/span>
\n \u3001<\/span>
\n insert<\/span>
\n \u3001 <\/span> <\/p>\n

assign<\/span>
\n \u3001<\/span>
\n push_back<\/span>
\n \u7b49\u3002<\/span> <\/p>\n

void insert(iterator pos, const T& x)
\n{
\nassert(pos < _finish);
\nassert(pos >= _start);<\/p>\n

if (size() == capacity())
\n{
\nreserve(capacity() == 0 ? 4 : 2 * capacity());
\n}<\/p>\n

iterator it = _finish – 1;
\nwhile (it >= pos)
\n{
\n*(it + 1) = *it;
\n–it;
\n}<\/p>\n

*pos = x;
\n++_finish;
\n} <\/p>\n

\u00a0\u5728\u4e0a\u9762\u8fd9\u6bb5\u7a0b\u5e8f\u4e2d，\u7531\u4e8e\u5bb9\u91cf\u6ee1\u4e86\u9700\u8981\u8fdb\u884c\u6269\u5bb9，\u5f00\u8f9f\u4e00\u6bb5\u65b0\u7a7a\u95f4<\/span>，\u5c06\u65e7\u7a7a\u95f4\u7684\u5143\u7d20\u62f7\u8d1d\u5230\u65b0\u7a7a\u95f4\u4e0a\u6765，\u5e76\u66f4\u65b0_start，_finish，_end_of_storage\u3002\u4f46\u5982\u679c\u8fed\u4ee3\u5668it\u6307\u5411\u65e7\u7a7a\u95f4\u4e0a\u7684\u5f00\u59cb\u4f4d\u7f6e<\/span>，\u6b64\u65f6\u8fdb\u884c*it\u4f1a\u5bfc\u81f4\u91ce\u6307\u9488\u89e3\u5f15\u7528\u95ee\u9898<\/span>，\u8fd9\u4e5f\u5c31\u662f\u6240\u8c13\u5730\u8fed\u4ee3\u5668\u5931\u6548\u4e86\u3002<\/span><\/p>\n

\"\"<\/p>\n<\/p>\n

\u90a3\u8be5\u5982\u4f55\u89e3\u51b3\u5462？\u66f4\u65b0\u8fed\u4ee3\u5668\u6307\u5411\u7684\u4f4d\u7f6e\u3002<\/p>\n

void insert(iterator pos, const T& x)
\n{
\nassert(pos < _finish);
\nassert(pos >= _start);<\/p>\n

\/\/\u9632\u6b62\u8fed\u4ee3\u5668\u5931\u6548
\nif (size() == capacity())
\n{
\nsize_t len = pos – _start;
\nreserve(capacity() == 0 ? 4 : 2 * capacity());
\npos = _start + len;
\n}<\/p>\n

\/\/…
\n}<\/p>\n

\u66f4\u65b0\u4e86\u8fed\u4ee3\u5668\u4f4d\u7f6e\u540e，\u89e3\u5f15\u7528\u8fd8\u662f\u4f1a\u62a5\u9519，\u8fd9\u662f\u4e3a\u4ec0\u4e48\u5462？\u8fd9\u91cc\u770b\u4f3c\u89e3\u51b3\u4e86\u95ee\u9898，\u4f46\u662f\u522b\u5fd8\u4e86\u5f62\u53c2\u7684\u6539\u53d8\u5e76\u4e0d\u80fd\u5f71\u54cd\u5b9e\u53c2<\/span>，\u5373\u5b9e\u53c2\u4e2d\u7684\u8fed\u4ee3\u5668\u4f9d\u7136\u6307\u5411\u65e7\u7a7a\u95f4\u7684\u4f4d\u7f6e，\u4f9d\u65e7\u4f1a\u4f7f\u8fed\u4ee3\u5668\u5931\u6548<\/span>\u3002\u90a3\u6211\u8ba9\u5f62\u53c2\u7684\u6539\u53d8\u5f71\u54cd\u5b9e\u53c2\u53ef\u884c\u5417，\u5373\u52a0\u4e0a\u5f15\u7528\u5462？<\/p>\n

void insert(iterator& pos, const T& x) <\/p>\n

\u800c\u6211\u4eec\u8bbe\u8ba1\u521d\u5fc3\u662f\u60f3\u8981pos\u53ef\u4ee5\u968f\u610f\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u5143\u7d20，\u5f53\u60f3\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e09\u4e2a\u5143\u7d20\u65f6<\/p>\n

v.insert(v.begin()+3,3); <\/p>\n

\u00a0\u7531\u4e8e\u662f\u5de6\u503c\u5f15\u7528\u53f3\u503c，\u9700\u8981\u662fconst\u5de6\u503c\u5f15\u7528\u624d\u80fd\u5f15\u7528\u53f3\u503c，\u90a3\u4e48\u518d\u8fdb\u884c\u66f4\u6539\u3002<\/p>\n

void insert(const iterator& pos, const T& x) <\/p>\n

\u8fd9\u91cc\u4f1a\u53d1\u73b0\u7531\u4e8econst\u7684\u4fee\u9970，\u4f1a\u5bfc\u81f4insert\u51fd\u6570\u5185\u90e8\u662f\u65e0\u6cd5\u4fee\u6539\u8fed\u4ee3\u5668pos\u4f4d\u7f6e\u7684<\/span>，\u56e0\u6b64\u8fd9\u79cd\u65b9\u6848\u4e5f\u662f\u4e0d\u53ef\u53d6\u7684\u3002<\/p>\n

\u603b\u4e4b，insert\u4ee5\u540e，\u9ed8\u8ba4\u8fed\u4ee3\u5668\u90fd\u5931\u6548\u4e86<\/span>（\u5c3d\u7ba1\u5728insert\u51fd\u6570\u91cc\u4fee\u590d\u4e86\u8fed\u4ee3\u5668\u6307\u5411\u4f4d\u7f6e，\u4f46\u7531\u4e8e\u5f62\u53c2\u5e76\u4e0d\u4f1a\u5b9e\u53c2）\u3002<\/p>\n

\n

2. <\/span>
\n \u6307\u5b9a\u4f4d\u7f6e\u5143\u7d20\u7684\u5220\u9664\u64cd\u4f5c –>\u00a0<\/span>
\n erase<\/span> <\/p>\n

void erase(iterator pos)
\n{
\nassert(pos < _finish);
\nassert(pos >= _start);<\/p>\n

iterator it = pos + 1;
\nwhile (it < _finish)
\n{
\n*(it – 1) = *it;
\n++it;
\n}
\n –_finish;
\n} <\/p>\n

\u8fd9\u91cc\u7684\u5220\u9664\u4f9d\u7136\u5b58\u5728\u7740\u4e00\u4e2a\u9690\u79d8\u7684\u95ee\u9898 –>\u90a3\u5b83\u53c8\u662f\u5982\u4f55\u5bfc\u81f4\u7684\u5462？<\/p>\n

auto it = v1.begin();
\nwhile (it != v1.end())
\n{
\nif (*it % 2 == 0)
\n{
\nv1.erase(it);
\n}<\/p>\n

++it;
\n} <\/p>\n

erase<\/span>
\n \u5220\u9664<\/span>
\n pos<\/span>
\n \u4f4d\u7f6e\u5143\u7d20\u540e，<\/span>
\n pos<\/span>
\n \u4f4d\u7f6e\u4e4b\u540e\u7684\u5143\u7d20\u4f1a\u5f80\u524d\u642c\u79fb，\u6ca1\u6709\u5bfc\u81f4\u5e95\u5c42\u7a7a\u95f4\u7684\u6539\u53d8，<\/span>
\n \u7406 <\/span> <\/p>\n

\u8bba\u4e0a\u8bb2\u8fed\u4ee3\u5668\u4e0d\u5e94\u8be5\u4f1a\u5931\u6548<\/span>
\n ，\u4f46\u662f：\u5982\u679c<\/span>
\n pos<\/span>
\n \u521a\u597d\u662f\u6700\u540e\u4e00\u4e2a\u5143\u7d20，<\/span>
\n \u5220\u5b8c\u4e4b\u540epos\u521a\u597d\u662fend <\/span> <\/p>\n

\u7684\u4f4d\u7f6e，\u800cend\u4f4d\u7f6e\u662f\u6ca1\u6709\u5143\u7d20\u7684，\u90a3\u4e48pos\u5c31\u5931\u6548\u4e86<\/span>（\u5373it\u548c_finish\u521a\u597d\u9519\u8fc7\u4e86，\u5faa\u73af\u5224\u65ad\u4f9d\u7136\u6210\u7acb，\u6b64\u65f6\u7ee7\u7eed\u6267\u884c\u4f1a\u51fa\u73b0\u9519\u8bef）\u3002<\/span> <\/p>\n

\"\" <\/p>\n

\u6309\u7167\u4e0a\u9762\u7684\u8bf4\u6cd5，\u90a3\u4e48\u6539\u4e0b\u5224\u65ad\u6761\u4ef6\u4e0d\u5c31\u80fd\u4f7fit\u7b49\u4e8e_finish\u4e86\u5417？（\u5982\u4e0b\u4ee3\u7801\u6240\u793a）\u4f46\u8fd0\u884c\u4e4b\u540e\u4f9d\u7136\u4f1a\u62a5\u9519，\u8fd9\u662f\u56e0\u4e3a
\n \u5220\u9664<\/span>
\n vector\u4e2d\u4efb\u610f\u4f4d\u7f6e\u4e0a\u5143\u7d20\u65f6，vs\u5c31\u8ba4\u4e3a\u8be5\u4f4d\u7f6e\u8fed\u4ee3\u5668\u5931\u6548\u4e86，\u5373\u5728<\/span>
\n vs\u4e0b\u68c0\u67e5\u4e25\u683c<\/span>
\n \u3002（Linux<\/span>
\n \u4e0b，<\/span>
\n g++<\/span>
\n \u7f16\u8bd1\u5668\u5bf9\u8fed\u4ee3\u5668\u5931\u6548\u7684\u68c0\u6d4b\u5e76\u4e0d\u662f\u975e\u5e38\u4e25\u683c，\u5904\u7406\u4e5f\u6ca1\u6709<\/span>
\n vs<\/span>
\n \u4e0b\u6781\u7aef）<\/span> <\/p>\n

auto it = v1.begin();
\nwhile (it != v1.end())
\n{
\nif (*it % 2 == 0)
\n{
\nv1.erase(it);
\n}
\nelse
\n{
\n++it;
\n}
\n} <\/p>\n

\u56e0\u6b64，\u4f7f\u7528erase\u63a5\u53e3<\/span>\u65f6\u5e76\u4e0d\u80fd\u4f9d\u8d56\u4e8e\u7f16\u8bd1\u5668，\u5e94\u6ce8\u610f\u9700\u8981\u624b\u52a8\u66f4\u65b0\u8fed\u4ee3\u5668\u9632\u6b62\u8fed\u4ee3\u5668\u5931\u6548\u95ee\u9898<\/span>\u3002<\/p>\n

\u5728stl\u5e93\u4e2d\u4e5f\u662f\u8fd9\u4e48\u89e3\u51b3\u7684\u3002<\/p>\n

\"\"<\/p>\n

\u8fed\u4ee3\u5668\u5931\u6548\u89e3\u51b3\u529e\u6cd5：\u5728\u4f7f\u7528\u524d，\u5bf9\u8fed\u4ee3\u5668\u91cd\u65b0\u8d4b\u503c\u5373\u53ef<\/span>
\n \u3002<\/span> <\/p>\n

auto it = v1.begin();
\nwhile (it != v1.end())
\n{
\nif (*it % 2 == 0)
\n{
\nit = v1.erase(it);
\n}
\nelse
\n{
\n++it;
\n}
\n} <\/p>\n

3. <\/span>\u4e0e<\/span>vector<\/span>\u7c7b\u4f3c，<\/span>string<\/span>\u5728\u63d2\u5165<\/span>+<\/span>\u6269\u5bb9\u64cd\u4f5c<\/span>+erase<\/span>\u4e4b\u540e，\u8fed\u4ee3\u5668\u4e5f\u4f1a\u5931\u6548<\/span>\u00a0<\/p>\n<\/p>\n

\u603b\u7684\u6765\u8bf4：vector\u7279\u522b\u9700\u8981\u6ce8\u610f\u7684\u662f\u5728\u4f7f\u7528insert\u548cerase\u63a5\u53e3\u5e94\u6ce8\u610f\u8fed\u4ee3\u5668\u5931\u6548\u95ee\u9898，\u8fd9\u6837\u624d\u80fd\u8ba9\u6211\u4eec\u5728\u4f7f\u7528stl\u5e93\u63a5\u53e3\u65f6\u5e94\u5bf9\u81ea\u5982\u3002<\/span><\/p>\n

\n

initializer_list\u5b9e\u73b0<\/h3>\n

void push_back(const T& x)
\n{
\nif (size() == capacity())
\n{
\nreserve(capacity() == 0 ? 4 : 2 * capacity());
\n}
\n*_finish = x;
\n_finish++;
\n}<\/p>\n

vector(initializer_list<T> il)
\n{
\nreserve(il.size());
\nfor (auto& ch : il)
\n{
\npush_back(ch);
\n}
\n} <\/p>\n

\n

\u00a0\"\"<\/p>\n

\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb1.4k\u6b21\uff0c\u70b9\u8d5e128\u6b21\uff0c\u6536\u85cf114\u6b21\u3002\u672c\u7ae0\u8282\u57fa\u672c\u4ecb\u7ecd\u4e86vector\u7684\u5e38\u89c1\u63a5\u53e3\u4ee5\u53cavector\u7c7b\u7684\u4ee3\u7801\u5b9e\u73b0\uff0c\u91cd\u70b9\u5728\u4e8e\u5b9e\u73b0vector\u51fa\u73b0\u7684\u8fed\u4ee3\u5668\u5931\u6548\u95ee\u9898\u3002<\/p>\n","protected":false},"author":2,"featured_media":40917,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,3752,2762,190,1813,3753],"topic":[],"class_list":["post-40926","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-c11","tag-vector","tag-190","tag-1813","tag-3753"],"yoast_head":"\n\u3010C++\u6307\u5357\u3011STL\u5bb9\u5668\u7684\u5b89\u5168\u9769\u547d\uff1a\u5982\u4f55\u5c01\u88c5Vector\u675c\u7edd\u8d8a\u754c\u8bbf\u95ee\u4e0e\u8fed\u4ee3\u5668\u5931\u6548\uff1f - 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