The latter is more logical to me as I want to convert a string to a char, and then turn it into a const char. But that doesn't work because one is a string, the other is a char. The former, as I understand, converts the string to a C-type string and then turns it into a...
return a const char* or char* from a function (perhaps for historical reasons - client's using your existing API - or for C compatibility you don't want to return a std::string, but do want to copy your string's data somewhere for the caller) be careful not to return a pointer t...
constchar*c=str.c_str(); std::cout<<c; return0; } 下載運行代碼 輸出: std::string to const char* 2.使用string::data功能 我們也可以調用string::data函數std::string得到的對象const char*.此功能的工作方式與string::c_str. 1 2 3
2. string to const char* string a="strte"; const char* r=a.c_str(); 注意是const的。还要转到char*: ~~~ 2.2. const char* to char* const char* r="123"; char *p1 = new char[strlen(r)+1]; strcpy(p1,r); 附:http://hi.baidu.com/cfans/blog/item/06970ef4b671f366dcc4745d....
这就看到了吧,返回值是const char*,这里须要注意一下。 1 string转const char* 当然是用到上面所述的方法c_str(): string s1 ="abcdeg";constchar*k = s1.c_str(); cout<<k<endl; 还有还有一种方法: data():与c_str()相似。可是返回的数组不以空字符终止。
1. string转const char* 代码语言:javascript 复制 string s="abc";constchar*c_s=s.c_str(); 2. const char*转string 直接赋值即可 代码语言:javascript 复制 constchar*c_s="abc";strings(c_s); 3. string转char* 代码语言:javascript 复制 ...
将std::string转换为const char *和函数调用是C++编程中常见的操作。下面是完善且全面的答案: 将std::string转换为const char *的方法有两种: 使用c_str()函数:std::string类提供了一个成员函数c_str(),它返回一个指向以null结尾的const char数组的指针,可以直接将其作为const char *类型使用。...
const std::string str = "hello world!" ; // http://en.cppreference.com/w/cpp/string/basic_string/c_str const char* cstr = str.c_str() ; // pointer to const char Mar 30, 2016 at 3:05am illesmateorion (3) Thank you! It's working. :D Mar 30, 2016 at 6:33pm MikeyBoy...
Hello. for my program I need to change a string into a const char ( for opendir ) 1234567 ... string uhome=getenv("HOME"); string dir1="/Desktop"; const char *findir=uhome+dir1; const char *curdir=findir; dir=opendir(curdir); ... thanks in advance and yes i have searched th...
cout<<"the CString is "<<c_str2<<endl; cout<<"the string is "<<str1<<endl;*/ //string转换成const char* //方法一: //string str2("Hello College of Information Engineering"); //const char * str3; //常数指针 //str3=str2.c_str(); ...