c – 使用初始化列表分配字符串
作者：互联网
>你能解释一下,为什么会有差异？
> PKcE是什么意思？
码：
#include <iostream>
#include <typeinfo>
using namespace std;
int main() {
string s {"IDE"};
std::cout<<typeid(s).name()<<std::endl;
auto S{"IDE"}; // why do not deduced as string?
std::cout<<typeid(S).name()<<std::endl;
auto c = {"IDE"}; // why do not deduced as string?
std::cout<<typeid(c).name()<<std::endl;
auto C {string{"IDE"}}; // why do not deduced as string?
std::cout<<typeid(C).name()<<std::endl;
auto Z = string{"IDE"};
std::cout<<typeid(Z).name()<<std::endl;
}
输出：
Ss
St16initializer_listIPKcE
St16initializer_listIPKcE
St16initializer_listISsE
Ss
解决方法:
string s {"IDE"}; // Type of s is explicit - std::string
auto S{"IDE"}; // Type of S is an initializer list consisting of one char const*.
auto c = {"IDE"}; // Type of c is same as above.
auto C {string{"IDE"}}; // Type of C is an initializer list consisting of one std::string
auto Z = string{"IDE"}; // Type of Z is std::string
我不知道PKcE代表什么.我只能猜测P代表Pointer,K代表const,c代表字符.不知道E可以代表什么.
标签：c,c11,initializer-list 来源： https://codeday.me/bug/20190824/1712212.html