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void clear() noexcept;功能：把string对象置为空 #include <iostream>#include <string> using namespace std; int main(){ char c; string str; cout << "please enter 阅读全文
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const_iterator cbegin() const noexcept; const_iterator cend() const noexcept;注：返回常量迭代器，不能修改 #include <iostream>#include <string> using namespace std; 阅读全文
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size_t capacity() const noexcept; #include <iostream>#include <string> using namespace std; int main(){ string s1("hello"); cout << "capacity:" << s1. 阅读全文
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iterator begin() noexcept; const_iterator begin() const noexcept; iterator end() noexcept; const_iterator end() const noexcept; #include <iostream>#in 阅读全文
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char& back(); const char& back() const; #include <iostream>#include <string> using namespace std;int main(){ string s1("hello"); cout << s1.back() << 阅读全文
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char& at (size_t pos); const char& at (size_t pos) const; #include <string>#include <iostream> using namespace std;int main(){ string s1("test"); for( 阅读全文
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string (1) string& assign (const string& str); substring (2) string& assign (const string& str, size_t subpos, size_t sublen); c-string (3) string& as 阅读全文
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string (1) string& append (const string& str); substring (2) string& append (const string& str, size_t subpos, size_t sublen); c-string (3) string& ap 阅读全文