boost string

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#include <vector>#include <string>#include <iostream>#include <boost/algorithm/string.hpp>#include <boost/format.hpp>int main(){std::string str("readme.txt");if (boost::ends_with(str,"txt")){std::cout<< boost::to_upper_copy(str) + " UPPER" << std::endl;std::cout<< boost::ends_with(str,"txt") << std::endl;}boost::replace_first(str,"readme","followme");std::cout<< str <<std::endl;std::vector<char> v(str.begin(),str.end());//1> 返回一个删除后copy的区间//2> 返回一个upper后的copy区间//3> copy 赋值操作符 std::vector<char> v2 = boost::to_upper_copy(boost::erase_first_copy(v,"txt"));for (unsigned int i = 0;i< v2.size(); ++i){std::cout<< v2[i];}//////////////////////////////////////////////////////////////////////////// 大小写转换std::string str1 = "I Don't Know.\n";std::cout<< str1 <<std::endl;std::cout<<"to_upper_copy -> " << boost::to_upper_copy(str1) << std::endl;std::cout<<"str1 -> " << str1 << std::endl; std::cout<<"to_lower_copy -> " << boost::to_lower_copy(str1) << std::endl;std::cout<<"str1 -> " << str1 << std::endl; boost::to_upper(str1);std::cout<<"str1 -> " << str1 << std::endl; boost::to_lower(str1);std::cout<<"str1 -> " << str1 << std::endl; //////////////////////////////////////////////////////////////////////////// 判断式（算法）std::string str2("Power Bomb");std::cout << boost::iends_with(str2,"bomb") << std::endl;std::cout << !boost::ends_with(str2,"bomb") << std::endl;std::cout << boost::starts_with(str2,"Pow") << std::endl;std::cout << boost::contains(str2,"er") << std::endl;std::string str3 = boost::to_lower_copy(str2);// 无大小写的 == 判断std::cout << boost::iequals(str2,str3) << std::endl;std::string str4("power suit");// 参数1 是否小于 参数2  -> 无符号比较std::cout << boost::ilexicographical_compare(str2,str4) << std::endl;// 判断0 -- 5 五个字符是否全为小写std::cout << boost::all(str3.substr(0,5),boost::is_lower()) << std::endl;//////////////////////////////////////////////////////////////////////////// 判断式（函数对象）std::string str5 = "Samus";std::string str6 = "samus"; std::cout<< boost::is_equal()(str5,str6) << std::endl;std::cout<< boost::is_less()(str5,str6) << std::endl;std::cout<< boost::is_not_greater()(str5,str6) << std::endl;//////////////////////////////////////////////////////////////////////////// 分类// 用于检测一个字符是否符合某种特性，主要用于搭配其他算法std::cout << boost::is_space()(' ') << std::endl;std::cout << boost::is_alnum()('l') << std::endl;std::cout << boost::is_alpha()('l') << std::endl;std::cout << boost::is_cntrl()('\n') << std::endl;std::cout << boost::is_digit()('1') << std::endl;std::cout << boost::is_graph()(' ') << std::endl;std::cout << boost::is_lower()('W') << std::endl;std::cout << boost::is_print()(250) << std::endl;std::cout << boost::is_punct()(',') << std::endl;//////////////////////////////////////////////////////////////////////////// 修剪算法boost::format fmt("|%s|\n");std::string str7 = "  samus aran  ";std::cout<< fmt % boost::trim_copy(str7) << std::endl;std::cout<< fmt % boost::trim_left_copy(str7) << std::endl;boost::trim_right(str7);std::cout << fmt % str7 << std::endl;std::string str8 = "2010 Hapy new Year!!!";std::cout << fmt % boost::trim_left_copy_if(str8,boost::is_digit())<<std::endl;std::cout << fmt % boost::trim_right_copy_if(str8,boost::is_punct())<<std::endl;std::cout << fmt % boost::trim_copy_if(str8,boost::is_digit() || boost::is_punct() || boost::is_space())<<std::endl;//////////////////////////////////////////////////////////////////////////// 查找boost::format fmt9("|%s|.pos = %d\n");std::string str9 = "Long long ago, there was a king."; boost::iterator_range<std::string::iterator> rge;  rge = boost::find_first(str9,"long");  std::cout<< fmt9 % rge % (rge.begin()- str9.begin());  rge = boost::ifind_first(str9,"long");  std::cout<< fmt9 % rge % (rge.begin() - str9.begin()); // 找第三次出现 rge = boost::find_nth(str9,"ng",2); std::cout<< fmt9 % rge % (rge.begin() - str9.begin());  rge = boost::find_head(str9,4); std::cout<< fmt9 % rge % (rge.begin() - str9.begin());  rge = boost::find_tail(str9,5); std::cout<< fmt9 % rge % (rge.begin() - str9.begin());  rge = boost::find_first(str9,"samus");  std::cout<< (rge.empty() && ! rge) <<std::endl;//////////////////////////////////////////////////////////////////////////// 替换和删除return 0;}
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