为什么我的程序不能从文件中将字符输入到2d数组中？

Question

I'm trying to input chars into a 2d array from a file, but its not putting anything into the array. When I try to print it out I just get a bunch of symbols that look like this - ╠

Here is an example that produces the same error:

test file looks like this:

g g g g g g g g g g
g g g t t t t t t g
g g g t t g t t g g
g t t g g t g g t g
g t t g g t g g t g
g t g t t g t t g g
g t t g g t g g t g
g t t g g t g g t g
g t g t t g t t g g
g g g g g g g g g g

Example that produces same error:

#include<iostream>
#include<string>
#include<fstream>

using namespace std;


int main() {
    ifstream inFile;
    char myArray[15][15];

    inFile.open("C:\test\Ch5p_fa.asc");

    int rows = 10;
    int columns = 10;

    for (int i = 0; i < rows; i++)
    {
        for (int j = 0; j < columns; j++) {
            inFile.get(myArray[i][j]);
        }
    }


    for (int i = 0; i < rows; i++)
    {
        for (int j = 0; j < columns; j++) {
            cout << myArray[i][j] << ' ';
        }
        cout << endl << endl;
    }

    inFile.close();

cin.get();

}

Answer 1

Your columns are two times smaller, as they dont account for white characters. You could write your first loop as follows for example, ising isalpha to check if your current character is alphanumeric:

char tmp;
for (int i = 0; i < rows; i++)
{
    for (int j = 0; j < columns*2; j++) {
        tmp = inFile.get();
        if (isalpha(tmp))
        {
            myArray[i][j/2] = tmp;
        }
    }
}

Answer 2

inFile.get(myArray[i][j]) will read all the characters, including spaces. Use the >> stream operator instead, this will skip the spaces:

if (!inFile)
    return 0;

//initialize the array
memset(myArray, 0, 15 * 15);

for (int i = 0; i < rows; i++)
{
    for (int j = 0; j < columns; j++)
    {
        if (!(inFile >> myArray[i][j]))
        {
            //break the loop
            i = rows;
            break;
        }
    }
}

Answer 3

Try this:

int main() {

    ifstream inFile;
    char myArray[15][15];

    inFile.open("C:\\test\\Ch5p_fa.asc", std::fstream::in);   // std::fstream::in allows you to read from the file.

    int rows = 10;
    int columns = 10;

    for (int i = 0; i < rows; i++)  {
        for (int j = 0; j < columns; j++) {
            inFile.get(myArray[i][j]);
            inFile.get();                       // Skeem unwonted char
        }
    }

    inFile.close();

    cin.get();

}

If you need the spaces just make column twice as big.