const char *c = str.c_str(); std::cout << c; return 0; } 下载 运行代码 输出: std::string to const char* 2.使用 string::data 功能 我们也可以调用 string::data 函数std::string 得到的对象 const char*.此功能的工作方式与 string::c_str. 1 2 3 4 5 6 7 8 9 10 11 12 #...
将const std::vector<std::string>转换为const char ** 、、 我有这样一个有签名的功能:{} 我希望将向量args转换为const char ** (我们实际上不能创建一个char **数组,因为它(显然)无法将const char *类型的args[i].c_str()转换为char 浏览3提问于2013-06-10得票数 2 回答已采纳 4回答 ...
How to convert a std::string to const char* or char*? 1. If you just want to pass a std::string to a function that needsconstchar* you canusestd::stringstr;constchar* c =str.c_str(); If you want to get a writable copy, likechar*, you candothat with this: std::stringstr;...
针对您提出的错误信息 [error] cannot convert 'std::string {aka std::basic_string<char>}' to 'const,这里有几个关键点需要注意,并给出相应的解决方案。首先,错误信息似乎是不完整的,因为它通常应该明确指出std::string不能转换为哪种const类型,但我们可以基于常见的几种情况进行讨论。 1. 理解错误...
如果你想得到一个可写的副本,比如 char * ,你可以这样做: std::string str; char * writable = new char[str.size() + 1]; std::copy(str.begin(), str.end(), writable); writable[str.size()] = '\0'; // don't forget the terminating 0 // don't forget to free the string after ...
std::string转const char*: std::string text; text = ui->lineEdit->text().toStdString();//QLineEdit输入constchar* c_s = text.c_str(); const char*转string 直接赋值即可 constchar* c_s = “abc”;strings(c_s) Qt中QString转const char*: ...
ptr是一个指向 char* 类型的常量，所以不能用ptr来修改所指向的内容，换句话说，*ptr的值为const，...
int main() { std::string name = "Hello"; { char *name = "Bye"; { char const *name_char = name.c_str(); } } return 0; } Try putting the cursor on the word name in the line giving the error and pressing F12, it might take you to the char*name. Thursday, April...
std::stringstr="std::string to char*"; char*c=const_cast<char*>(str.c_str()); std::cout<<c; return0; } DownloadRun Code Output: std::string to char* 2. Usingstrcpy()function Here, the idea is to pass theconst char*returned by thestring::c_strorstring::datafunctions to the...
You can use the c_str() method of the string class to get a const char* with the string contents. example #include<iostream> using namespace std; int main() { string x("hello"); const char* ccx = x.c_str(); cout << ccx; } Advertisement - This is a modal window. No ...