convert string to int array?

[enosmac]

Hi, I'm grabbing an 8 bit integer from a file using an ifstream object and assigning it to a string.

Example, I'm grabbing 10101010 from a file and assigning it to stringName.

ifstream inFile;
string = stringName;
inFile >> stringName;

the problem is, I MUST convert stringName to an int array, where arrayName[0]=1, arrayName[1]=0, arrayName[2]=1 etc.

Can anyone PLEASE show me code how to do this? Its for a project, and I want to figure the rest out myself, but this one step is holding me up.

[Texan40]

For any numeric digit you can get the actual value by subtracting out the ascii value of '0'

#include <iostream>
#include <cstring>

int main()
{
  char charArray[] = "10101010";
  int intArray[strlen(charArray)];
  for(int idx = 0; idx < strlen(charArray); idx++)
  {
    intArray[idx] = charArray[idx] - '0';
  }
}

[enosmac]

Ok, I understand that, but the "10101010" is stored as a string, not a char array. What's the syntax to convert a string to a char array so I can use the above?

[vlad from moscow]

#include <algorithm>

std::transform( stringName.begin(), stringName.end(), array,
                []( char c ) -> int { return ( c - '\0' ); } ); 

[enosmac]

error C2039: 'transfer' : is not a member of 'std'

is the error I get when I try to use the above....

[Texan40]

a "string" is just a specialized character array with a null terminator. (with the exception of std::string)

[enosmac]

#include <iostream>
#include <string>
using namespace std;

int main(){
	const int SIZE = 8;
	string test = "10101010";
	int buffer[SIZE];

	for(int i = 0; i < SIZE; i++){
		buffer[i] = test[i]-48;
	}

	for(int i = 0; i < SIZE; i++){
		cout << buffer[i];
	}

	system("pause");
	return 0;
}

I believe this will do it, because my bits will always be 8. Not sure why the -48 works, but I guess it has something to do with ASCII

[vlad from moscow]

@enosmac
error C2039: 'transfer' : is not a member of 'std'

is the error I get when I try to use the above....

There was a typo. Instead of transfer shall be transform.

@enosmac
Not sure why the -48 works

48 is ASCII code of '0'. It is better to use '0' instead of 48.