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...
C/C++ : converting std::string to const char* I get the error : left of '.c_str' must have class/struct/union type is 'char *' C# to C++ dll - how to pass strings as In/Out parameters to unmanaged functions that expect a string (LPSTR) as a function parameter. C++ int to...
using namespace std; void main(int argc, char* argv[]) { const char *p1 = "111"; string p2(p1); printf("const char * to string : %s\n",p2.c_str()); string p3("222"); const char* p4 = p3.c_str(); printf("string to const char * : %s\n",p4); char * p5 = "3...
1. char* to string string s(char *); 注:在不是初始化的地方最好用assign(). !!! 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=...
const char* cpc = "abc"; char* pc = new char[100];//足够长 strcpy(pc,cpc); strcpy(pc,cpc)是copy cpc to pc,但是遇到\0就会作为结束符结束拷贝,当cpc是包含很多个结束符时,逻辑错误,所以有的时候需要用 pc = const_cast<char*>(cpc.c_str()) ...
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...
当在vs中遇到不存在从QString到const char *的适合转换函数这样的错误时,有两种方式解决,如下: #include<QtCore/QCoreApplication>#include<QDebug>intmain(intargc,char*argv[]){QCoreApplicationa(argc,argv);QStringhello("Hello World");constchar*chHello=hello.toLocal8Bit().data();constchar*chHelloUf...
const char* cstr = str.to_string().c_str(); 在这个例子中,to_string()函数将 std::string 转换为 std::string 类型的对象,然后c_str()运算符将该对象转换为 const char* 类型的指针。 需要注意的是,to_string()函数只能在 std::string 类型的对象上调用,并且必须在调用该函数之前已经设置了该对象的...