Odtnhj

i'm having problems reading a file and saving the values.

So the input file contains:

3 5

W2 R3 W3 R4

And what i want is this:

F = 3

P = 5

char Ac = 'W','R','W','R';

int acc = 2,3,3,4;

I already have the F = 3 and P = 5 but i don't know how to separate the other Strings.

I hope you can help me!

You can read character by character, skipping whitespaces.

Or you could read in a string, then split the string:

std::string rw_text;
std::vector<char> Ac;
std::vector<int> acc;
//...
while (input_file >> rw_text)

 const char letter = rw_text[0];
 const int number = rw_text[1] - '0';
 Ac.push_back(letter);
 acc.push_back(number);

You could also use a struct to keep your letters and numbers together, like a pair.

struct Letter_Number

 char letter;
 int number;
 friend std::istream& operator>>(std::istream& input, Letter_Number& ln);
;

std::istream& operator>>(std::istream& input, Letter_Number& ln)

 input >> ln.letter;
 input >> ln.number;
 return input;


//...
std::vector<Letter_Number> database;
Letter_Number ln;
//...
while (input_file >> ln) 

 database.push_back(ln);

A structure will keep the letters associated with their numbers. In a parallel array, you could have different offsets or the pair won't line up.

Also, with having a structure, the letter and number will be on the processor's same data cache line, so your program will be more efficient. Otherwise the processor will have to load in the Ac array, get the value, then load in the acc array and load in the character; wasting time reloading the data cache.