摘要：
string (1) size_t find_last_of (const string& str, size_t pos = npos) const noexcept; c-string (2) size_t find_last_of (const char* s, size_t pos = np 阅读全文
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#include <iostream>#include <string> using namespace std;int main(){ string s1("abcdemyyngl"); string s2("mngf"); size_t n = s1.find_last_not_of(s2); 阅读全文
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string (1) size_t find_first_of (const string& str, size_t pos = 0) const noexcept; c-string (2) size_t find_first_of (const char* s, size_t pos = 0) 阅读全文
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string (1) size_t find_first_not_of (const string& str, size_t pos = 0) const noexcept; c-string (2) size_t find_first_not_of (const char* s, size_t p 阅读全文
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sequence (1) string& erase (size_t pos = 0, size_t len = npos);两个参数都有默认值，传递的唯一参数匹配第一个 character (2) iterator erase (const_iterator p);//擦除迭代器指定的一个字符 r 阅读全文
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bool empty() const noexcept;注：判断string对象是否为空，为空返回true #include <iostream>#include <string> using namespace std; int main(){ string line; string conten 阅读全文
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const char* data() const noexcept;注：同c_str #include <iostream>#include <string>#include <cstring>using namespace std;int main(){ string s1("hellolyy") 阅读全文