How to convert a char array to a string?

c++ string char arrays
RajSanpui picture RajSanpui · Jan 22, 2012 · Viewed 843.8k times · Source

Converting a C++ string to a char array is pretty straightorward using the c_str function of string and then doing strcpy. However, how to do the opposite?

I have a char array like: char arr[ ] = "This is a test"; to be converted back to: string str = "This is a test.

Answer

Mysticial picture Mysticial · Jan 22, 2012

The string class has a constructor that takes a NULL-terminated C-string:

char arr[ ] = "This is a test";

string str(arr);


//  You can also assign directly to a string.
str = "This is another string";

// or
str = arr;

Related questions

Why must a pointer to a char array need strcpy to assign characters to its array and double quotes assignment will not work?

The first example does not work when you go to delete the pointer. The program either hangs when I add the null terminator or without it I get: Debug Assertion Failed Expression: _BLOCK_TYPE_IS_VALID(pHead->nBlockUse) from …

Read More
How to convert a std::string to const char* or char*?

How can I convert an std::string to a char* or a const char*?

Read More
std::string to char*

I want to convert a std::string into a char* or char[] data type. std::string str = "string"; char* chr = str; Results in: “error: cannot convert ‘std::string’ to ‘char’ ...”. What methods are there available to do this?

Read More