Thread: How to subtract string arrays?

I was wondering if someone could tell me how to subtract two string arrays. I use getline() that is why the array is a string. It is in my main, but the below code is my function.
Also the data inside the array is just numbers such as: 88 91 100 etc, Just want to subtract those numbers

I Get the errors from these two lines of code.

Code:

HUFFMAN[i] = dataCASE1[i] - dataCASE1[i-16];

Code:

HUFFMAN[i] = dataCASE1[i] - dataCASE1[i-1];

Code:

void algor1(int sizeCASE1, int columnCASE1, string dataCASE1[]){    
    string HUFFMAN[256];
    ofstream outStream;


    outStream.open("outfile.txt");


    if(outStream.fail())
    {
        cout << "Output file opening failed.\n";
        exit(1);
    }


    HUFFMAN[0] = dataCASE1[0];


    for(int i = 1; i < sizeCASE1; i++)
    {
        if(i == columnCASE1)
        {
            HUFFMAN[i] = dataCASE1[i] - dataCASE1[i-16];
        }
        else
            HUFFMAN[i] = dataCASE1[i] - dataCASE1[i-1];
    }


    for(int j = 0; j < sizeCASE1; j++)
    {
        outStream << HUFFMAN[j];
    }
    outStream.close();
}

Thanks

You need to extract the numbers from the string in some suitable order, do the subtraction, and (if you need the results as a string) write the results back to the string in some manner.

If you get errors, that's great; all you need to do now is post them.
No sense keeping them to yourself, share 'em around.