C++ iostream 编码？

Question

I have an input.txt and an output.txt , obviously I generate the output.txt , which for now is to write the exact same thing out, but it does not do that because of a possible encoding(?) error.

Here are pictures of the input and output:

My code looks like this:

Menu.cpp:

void Menu::kiir(){
    ofstream myfile("output.txt");
    if (myfile.is_open()){
        myfile << sakk.toString();
    }
}

The toString() method in sakktabla.cpp :

string sakktabla::toString(){
    std::string eredmeny="";
    int x = this->x;
    int y = this->y;
    for (int i = 0; i < x; i++){
        for (int j = 0; j < y; j++){
            eredmeny += (int)getValue(i, j);
        }
        eredmeny += "\n";
    }
    return eredmeny;
}

The getValue() method:

int sakktabla::getValue(int x, int y){
    return this->_vec[x][y];
}

Answer 1

I don't see where you're ingesting, but you seem to be:

• reading character input such as the character '2' ;
• converting that to integer input, ie the integer 2 ;
• outputting that integer, here producing an ASCII character with value 2 .

Possibly the confusion is that std::string::operator+= doesn't do any sort of conversion.

You possibly want:

eredmeny += std::to_string(getValue(i, j));

std::to_string() converts a bunch of numeric types to their human-readable string counterparts.