Help - load numbers from a .txt file to variables (c++)

Program 2 should show 111, 2开发者_开发知识库22 and 333 as result for x,y,z. I want to read the text file, line to line, and save one line to one variable like: Line1 = x Line2=y Line3 =z Can someone help me?

PROGRAM 1

#include <iostream>
#include <fstream>
#include <cstdlib>
using namespace std;

float x, y, z;

int main()
{   
    x=111;
    y=222;
    z=333;
    ofstream meuarquivo;
    meuarquivo.open ("brasil.txt");
    meuarquivo << x << "\n";
    meuarquivo << y << "\n";
    meuarquivo << z << "\n";

    meuarquivo.close ();

    return 0;
}

PROGRAM 2

#include <iostream>
#include <fstream>
#include <cstdlib>
using namespace std;

float x, y, z;


int main(){ 
    x=0;
    y=0;
    z=0;

    char nomedoarquivo[90];
    ifstream objeto;
    cin.getline (nomedoarquivo, 90);

    objeto.open (nomedoarquivo);

    if (!objeto.is_open ()){
        exit (EXIT_FAILURE);}

    while (objeto.good()){
        string r;
        objeto >>r;

    }

    cout << "\n" << x << "\n" << y << "\n" << z << "\n";
    return 0;
}

The second program needs to read input from a file. But the program isn't opening the file the first program has written to.

1. Have a std::vector to store the strings that are read from file.
2. Open the file in read mode, which the first program has written text to, as a part of first program.
3. push_back the each read string to the vector until the end of file is reached.

4. Iterate through the vector and convert std::string using atoi.

   int readNumber = atoi((*iter).c_str()) ;

This should give you an idea.

The code segment

while (objeto.good()){
    string r;
    objeto >>r;
}

basically means that you are reading in each number as a string, and discarding it immediately when the loop scope ends. Instead I would suggest creating an float array of size three, reading into them using the loop, and then assigning the values of each of the elements to x, y and z, like so:

float vals[3];
int i = 0;
while (objeto.good()) {
    objeto >> vals[i];
    i++;
}
x = vals[0]; y = vals[1]; z = vals[2];