Error while copying the value of string type variable to a character type variable.

Question

Here is the code

string cd;
char ch[30];

fstream fl("a.txt", ios::in|ios::out);

while(getline(fl,cd)){

cout<<cd<<endl;
strcpy(ch, cd); /*error over here*/

}

I am trying to fetch data from a file and I am displaying it and at the same time I want to copy the value of string cd into char ch[30] but it's showing error.

Can anyone plz help me out in how to copy the value of string cd into char ch[30] in c++.

Answer 1

function strcpy expect second parameter of type " char const* " and you passed a "std::string" type.
so you should do something like that: strcpy(ch, cd.data());

Answer 2

.data() function converts the string into char array (C-style string)

Answer 3

Mohamed ELomari thanx for the answer . Since i am a beginner in c++ can you plz be elaborate about "cd.data()"?

Answer 4

https://en.cppreference.com/w/cpp/string/basic_string/data