下面是说明字符串的程序:: find_last_of(): // C++ program to illustrate string::find_last_of#include<cstddef>#include<iostream>#include<string>usingnamespacestd;// Driver Codeintmain(){// Given Stringstringstr("Welcome to GeeksforGeeks!");// Character to be foundcharch ='e';// To sto...
canvas->Update();size_tidx = outputFileName.find_last_of('.');std::stringoutputFileName_plot =std::string(outputFileName,0, idx);if( idx !=std::string::npos ) canvas->Print(std::string(outputFileName_plot).append(std::string(outputFileName, idx)).data()); canvas->Print(std::s...
cout << s1.find_last_of('e', 3) << endl; if(s1.find_last_of('e', 3) == string::npos) cout << "string::npos\n"; return 0; }
string str = "Hello World!" int index = str.find_last_of("World"); 这样就可以查找字符串“World”在字符串中最后出现的位置,即7; find_last_of函数还可以接受一个可选参数pos,它指明了向左搜索的开始位置: string str = "ABCDabcdABCD"; int index = str.find_last_of("ABCD", 6); 函数首先...
string类提供字符串处理函数,利用这些函数,程序员可以在字符串内查找字符,提取连续字符序列(称为子串),以及在字符串中删除和添加。我们将介绍一些主要函数。 1.函数find_first_of()和find_last_of() 执行简单的模式匹配,如在字符串中查找单个字符c。函数find_first_of() 查找在字符串中第1个出现的字符c,而函数...
查看资料得知,find_last_of只能用来查找单个"字符“,即便是参数为字符串,也只是看作由字符组成数组,从原字符串中查找这些字符。 若要查找子串,正确的用法是使用rfind,修改如下: // judge if it's a names file if(config.classesFile.rfind(".names") != std::string::npos) ...
// string::find_last_of#include<iostream> // std::cout#include<string> // std::string#include<cstddef> // std::size_tvoidSplitFilename(conststd::string&str){std::cout<<"Splitting: "<<str<<'\n';std::size_tfound=str.find_last_of("/\\");std::cout<<" path: "<<str.substr(...
<string> std::string::find_last_of C++98 C++11 string (1) size_t find_last_of (const string& str, size_t pos = npos) const; c-string (2) size_t find_last_of (const char* s, size_t pos = npos) const; buffer (3) size_t find_last_of (const char* s, size_t pos...
( value_type _Ch, size_type _Off = npos ) const; size_type find_last_of( const value_type* _Ptr, size_type _Off = npos ) const; size_type find_last_of( const value_type* _Ptr, size_type _Off, size_type _Count ) const; size_type find_last_of( const basic_string<CharType...
( value_type _Ch, size_type _Off = npos ) const; size_type find_last_of( const value_type* _Ptr, size_type _Off = npos ) const; size_type find_last_of( const value_type* _Ptr, size_type _Off, size_type _Count ) const; size_type find_last_of( const basic_string<CharType...