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