constexprbasic_string substr(size_type pos=0, size_type count=npos)const&; (since C++23) constexprbasic_string substr(size_type pos=0, size_type count=npos)&&; (2)(since C++23) Returns a substring[pos,pos+count)
constexpr basic_string substr( size_type pos = 0, size_type count = npos ) &&; (2) (C++23 起) 返回子串 [pos, pos + count)。如果请求的子串越过字符串的结尾,即 count 大于size() - pos(例如 count == npos),那么返回的子串是 [pos, size())。 1) 等价于 return basic_string(*this,...
<cpp |string |basic string view constexprbasic_string_view substr(size_type pos=0, size_type count=npos)const; (since C++17) Returns a view of the substring[pos,pos+rlen), whererlenis the smaller ofcountandsize()-pos.
a, b,内建的逗号表达式,其中 b 是纯右值; a ? b : c,对某些 b 和c 的三元条件表达式(细节见定义); 转换到非引用类型的转型表达式,例如 static_cast<double>(x)、std::string{} 或(int)42; this 指针; 枚举项; 具有标量类型的非类型模板形参; template...
substr liefert einen Teilstring Original: returns a substring The text has been machine-translated viaGoogle Translate. You can help to correct and verify the translation. Clickherefor instructions. (öffentliche Elementfunktion)[edit] copy
#include <string>using namespace std;#define debug(x) cout<<#x<<": "<<(x)<<endl;bool test(string s,int base=0) { size_t pos = 3; cout << s << ": " << stoi(s,&pos, base) << endl; debug(pos) debug(s.substr(pos)) return true;}int main() { // 若 base 为 0 ...
14) 强转为非引用类型的表达式,比如,static_cast<double>(x), std::string{}, (int)42 。 15) 【lambda 表达式,比如,[](int x){ return x*x; } (since C++11)】。 纯右值表达式的属性[properties]: 1) 拥有右值[rvalue]表达式的所有属性。
a literal (except for string literal), such as 42, true or nullptr; (字面值常量,除了字符串,都是纯右值,包括空指针,true和false) a function call or an overloaded operator expression of non-reference return type, such as str.substr(1, 2), str1 + str2, or it++; ...
if ( deleteNode((string)$nd->nodeName )) { $toRemove[] = $nd; } } foreach ($toRemove as $remNd) { $nde->removeChild( $remNd ); } } }function deleteNode( $nodeName ) { if ( $nodeName == "script" || $nodeName == "meta" || $nodeName == "style" ) ...
substr - 指向要查找的空终止字节字符串的指针 返回值 指向于 str 中找到的子串首字符的指针,或若找不到该子串则为空指针。若 substr 指向空字符串,则返回 str。 示例运行此代码 #include <string.h> #include <stdio.h> void find_str(char const* str, char const* substr) { char* pos = strstr(st...