Question

I want to take a string,and populate an array with its values. I know the length of the string is 16. I have tried

char *bit_number[16];
bit_number = bin.data();

and

char bit_number[16];
bit_number = bin.data();

I don’t understand what String.data() is returning, why can’t I assign it directly to an array? I’m getting compiler errors:

error: incompatible types in assignment of ‘const char*’ to ‘char* [16]’

and

error: incompatible types in assignment of ‘const char*’ to ‘char [16]’

Answer 1

You can use std::string::c_str() to get access to the char array, and then use strcpy to move it over to the new array.

string s = "1234";
char arr[5] = { 0 };
strcpy(arr, s.c_str());