std::string_view sv = "12345"; int i1 = atoi(sv.data()); // Works, have i1 = 12345 int i2 = atoi(sv.substr(1,2).data()); // Works, but wrong, have i2 = 2345, not 23 所以atoi 也不起作用,因为它基于空终止符 '\0' (例如 sv.substr 不能简单地插入/添加一个)。 现在...
int main(){std::string str = "abcdefghijklmnopqrtstuvwxyz";{TimerWrapper timer_wrapper("string");TestString(str);}{TimerWrapper timer_wrapper("stringview");std::string_view str_view = str;TestStringView(str_view);}std::string_view str_view_str = "testing string_view related..";std::s...
std::string 会触发内存的重新分配 int need_realloc { std::string str = "Initial String"; str += " with more data"; // 修改字符串,可能导致重新分配内存 std::cout << str << std::endl; return 0; } int main() { std::string large_str = "This is a large string that might be co...
cpp #include<iostream>#include<string>#include<string_view>intmain(){// 从 C 风格字符串创建 string_viewconstchar* cstr ="Hello, World!";std::string_viewsv1(cstr);// 从 std::string 创建 string_viewstd::string str ="Hello, C++!";std::string_viewsv2(str);// 输出 string_view 的内...
#include <iostream> #include <vector> #include <string_view> int main() { std::vector<uint8_t> data = {104, 101, 108, 108, 111}; // 示例数据,存储了 "hello" 的ASCII码 // 将std::vector<uint8_t>转换为std::string_view std::string_view view(reinterpret_cast<const char*>(...
#include <string_view>#include <iostream>int main() {std::string str = "Hello, World!";std::string_view sv = str; // 视图,不复制字符串std::cout << sv << std::endl;return 0;} 2.3std::string和std::string_view之间的转换
#include<iostream>#include<vector>#include<string>#include<string_view>intmain(){constchar* ch ="hello world";std::string_viewsv(ch,2); std::cout << sv << std::endl; std::cout << sv.data() << std::endl;return0; } AI代码助手复制代码 ...
之所以选择您的模板构造函数，是因为它比std::string_view构造函数更适合std::string。StringContainer被...
voidPrintSpanArray(std::span<int>array){for(autoitem:array){cout<<item<<endl;}}voidPrintArray(int*array,intlength){for(inti=0;i<length;++i){cout<<array[i]<<endl;}}intarray[]={1,2,3,4,5};// 不使用span时PrintArray(array,ARRAY_SIZE(array));// 使用span时PrintSpanArray(array); ...
#include <iostream>#include <string_view>#include <typeinfo>voidprint_each_character(conststd::string_viewsw){for(charc:sw)std::cout<<(c=='\0'?'@':c);std::cout<<'\n';}intmain(){usingnamespacestd::literals;std::string_views1="abc\0\0def";std::string_views2="abc\0\0def"sv...