std::basic_string Defined in header<string> std::stringto_string(intvalue); (1)(since C++11) std::stringto_string(longvalue); (2)(since C++11) std::stringto_string(longlongvalue); (3)(since C++11) std::stringto_string(unsignedvalue); ...
std::stringto_string(longdoublevalue); (9)(C++11 起) 将数值转换为std::string。 令buf为一个足够容纳结果的内部转换函数缓冲区。 1)把有符号十进制整数转换为字符串,如同std::sprintf(buf,"%d", value)。 2)把有符号十进制整数转换为字符串,如同std::sprintf(buf,"%ld", value)。
#include <iostream>#include <string>voiddouble_string(std::string&s){s+=s;// 's' 与 main() 的 'str' 是同一对象}intmain(){std::stringstr="Test";double_string(str);std::cout<<str<<'\n';} 当函数的返回值是左值引用时,函数调用表达式变成左值表达式: ...
("c_func called with '%s'\n", c_str);}intmain(){std::stringconsts("Emplary");constchar*p=s.c_str();assert(s.size()==std::strlen(p));assert(std::equal(s.begin(), s.end(), p));assert(std::equal(p, p+s.size(), s.begin()));assert('\0'==*(p+s.size()));c_...
{std::string::size_typen;std::stringconsts="This is a string";// search backwards from end of stringn=s.rfind("is");print(n,2, s);// search backwards from position 4n=s.rfind("is",4);print(n,2, s);// find a single charactern=s.rfind('s');print(n,1, s);// find a...
std::stringto_string(unsignedvalue); (4)(начинаяс C++11) std::stringto_string(unsignedlongvalue); (5)(начинаяс C++11) std::stringto_string(unsignedlonglongvalue); (6)(начинаяс C++11) std::stringto_string(floatvalue); ...
a cast expression to non-reference type, such as static_cast(x), std::string{}, or (int)42; the this pointer; (this指针也是纯右值,因为this也是一个地址) a lambda expression, such as [](int x){ return x * x; }.(since C++11) ...
std::stringto_string(unsignedvalue); (4)(seit C++11) std::stringto_string(unsignedlongvalue); (5)(seit C++11) std::stringto_string(unsignedlonglongvalue); (6)(seit C++11) std::stringto_string(floatvalue); (7)(seit C++11)
>classbasic_string; Das Klassen-Templatebasic_stringspeichert und manipuliert Sequenzen von char-ähnliche Objekte (dh Objekte, für die eine Spezialisierung derstd::char_traitsoder kompatible Merkmale Klasse bereitgestellt wird) . Original: ...
std::basic_string C++ Bibliothèque de chaînes de caractères std::basic_string Déclaré dans l'en-tête<string> template< classCharT, classTraits=std::char_traits<CharT>, classAllocator=std::allocator<CharT> >classbasic_string; (1) ...