读取文件并将其输入为整数数组

Question

I am working on HEVC ie X265 and over here I am trying input the QP array with the values I read from file.I know that values of qp array would be from 0 to 100.

I have created a testing file and input a combination of 1's and 0's till 99. The files looks like this:

10101010110101010000000000000000000000000000000000000000000000000000000000000000000000000000000000

the code i have written for this purpose is as follows:

ifstream myfile;
    myfile.open("/Users/Ahmedrik/Mine/Uni-Stuff/Test-FYP/roi.txt");
    char input[100];
    int qp_input[100];


        while (!myfile.eof()) {
            myfile >> input;
            cout<< input<<endl;
        }myfile.close();


    for(int i=0;i<100;i++){
        qp_input[i]=(int)input[i];
        if(qp_input[i]==48){
            qp_input[i]=1;
        }
        else
            qp_input[i]=0;

        cout<<i<<" : "<<qp_input[i]<<endl;
    }

But I am unable to have correct values. The qp_input stays 0. What is it that I am doing wrong?

Answer 1

Check this solution

#include <stdio.h>
#include <iostream>
#include <string.h>
#include <sstream>
#include <fstream>
using namespace std;
int main(int argc, char* argv[]) {
    ifstream myfile;
    myfile.open("text.txt");

    int qp_input[100];

    //will read whole contents to a string instead of while(!myfile.eof())
    std::string input( (std::istreambuf_iterator<char>(myfile) ),
                       (std::istreambuf_iterator<char>()    ) );
    for(int i=0;i<input.size();i++){
        stringstream ss;
        ss<<input[i];
        ss>>qp_input[i];
        cout<<i<<" : "<<qp_input[i]<<endl;
    }
}

Answer 2

Input in an array and you are trying to read into the pointer " >> input" instead of into the array indices within that array eg ">> input[index]". You should have a counter in your loop and read into the array.

    int index = 0;
    while (!myfile.eof()) {
        myfile >> input[index];
        cout<< input[index] <<endl;
        index++;
    }
    myfile.close();

Also, what type is the data in the file. At the monent you will read in characters so it's assuming they are bytes. If you have the results in plain text decimal format you will want to change the type of input to int or double.