Linked Questions
96 questions linked to/from How to convert a std::string to const char* or char*
7
votes
3
answers
823
views
what is the difference between a[0] and &a[0] in string
string a = "asdf";
cout<<&a[0];
cout<<a[0];
Why are these two outputs different? Why is &a[0] not the address but the whole string?
- 101
2
votes
3
answers
10k
views
C++ std::stringstream to const char* conversion [closed]
I am trying to convert a stringstream into a const char*, but I always get a blank string.
My Code:
#include<string>
#include<sstream>
#include<stdio.h>
const char* test(std::...
- 433
3
votes
5
answers
6k
views
Cannot convert string to const char
I have this function and the compiler yells at me saying "Cannot convert string to const char".
void
DramaticLetters(string s, short TimeLength)
{
for(int i = 0, sLen = strlen(s); i < sLen; i+...
- 557
2
votes
3
answers
4k
views
Converting std string to const char*
I am getting an error when I run this piece of code
string line;
getline (myfile,line);
char file_input[15];
strncpy(file_input, line, 6);
cout << line << endl;
Error - cannot ...
- 999
-8
votes
1
answer
3k
views
How do I rename a file with a string using the rename() function (c++)? [closed]
Here is my code:
rename("tmp.png", Filename);
The 2nd argument in the rename function is a string.(The user decides what the name is)
How do I properly code this so that tmp.png is renamed to ...
0
votes
2
answers
5k
views
C++ Expression Must Have Class Type - String to const char*
Trying to convert string to const char* gives "expression must have class type"
at the bottom line. Tried some variations on converting with no luck. any ideas?
string GetMachineID()
{
...
- 65
1
vote
2
answers
3k
views
c++ no suitable conversion function from "std::string" to "const char*" exists
the question as the title suggests, is an error when i was executing my program in the certain part of the password function. actually it is a basic password function which was working properly in ...
- 13
0
votes
6
answers
3k
views
How to create a char array from string constant?
I try to create a char* values[] for my unittests that will be written but initialized from constants. The naive way throws a warning that ISO C++ forbids it:
char* single[1];
single[0] = "foobar";
I ...
- 2,601
2
votes
3
answers
5k
views
how convert string to xmlChar
I'm trying to convert a string to an xmlChar. The compiler says no suitable conversion function from const string to xmlChar exists. This is what the code looks like:
bool ClassName::openFile(const ...
- 3,946
1
vote
3
answers
1k
views
Converting string to const* char
I have two string declarations:
killerName
victimName
I need to convert these two string values to const* char.
Example of how I use my method:
if (killer.IsRealPlayer) {
killerName = killer....
- 143
3
votes
2
answers
2k
views
conversion between char* and std::string and const char*
I am now using C++ to program a robot using PROS. Pros has a print function, which is taking in a const char*. Now, I'm using lvgl to create my own screen, and I want to replicate the print function. ...
- 333
1
vote
1
answer
7k
views
How to convert string to const char[] in c++
I am working on a C++ project for a Vex Robot, I am using a function that takes a const char[] but for showing an integer, there is no such function that converts to const char[], so is there a way to ...
- 31
0
votes
3
answers
1k
views
Getting char * or const char * data from a string breaks for 16 character strings or longer
I have a function string_to_char() which attempts to give me a form of a string which I can pass into a library I am using, which wants char * (but I think works with const char *, so I've been trying ...
- 67
1
vote
2
answers
1k
views
Unable to return the contents of a vector<char> as a char* pointer
I am trying to store a char* into a struct's char* field. I have tried different things but none of them worked. The problematic piece of code is shown below:
pInfo is the object of the struct ...
- 850
0
votes
2
answers
2k
views
Why does hash<const char*> work for strings but not string variables?
My question is why does the following code work
hash<const char*> PassHash;
cout << PassHash("Hello World");
But this code wont compile.
hash<const char*> PassHash;
string ...
- 11