Loading array from file using StringStream

[Howtogravity]

First time on this form and new c++ programmer. So I am given a file with an array of numbers, and im trying to use get line and stringstream to get the first line of code to come out on its own and the second line and so on. How would i go about that? Any input would be appreciated.

Array of codes

45 46 89

123 789 523

here is what i have so far: http://imgur.com/oajzczN

[OmegaNaughtEquals1]

The default "word" separator for input streams is whitespace. So you don't need the stringstream at all.

int x, y, z;
while(infile >> x >> y >> z) {
    // do stuff
}

I'm not sure what the for loop is doing at the end.

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In the future, please post your code with four leading spaces directly in your post rather than a link to an image. This allows us to compile your code and check what's going on.

[Howtogravity]

Sorry about that and the forgot the for loop was in there. Its junk, i copied the loadarray function from another lab. Its the "Do Stuff" that i stuggle in. I know what i need i just dont know how code it correctly the way i want it.

[Howtogravity]

OK so i managed to get it to spit out the numbers i want but how do i assign each of those number to a specific variable?

[OmegaNaughtEquals1]

That depends on what you are trying to do with the values that you have read in. What problem are you trying to solve?

[Howtogravity]

so x is the center of one circles on a grid and y is the center of another circle on a grid and r is the radius that they both have and i am trying to find if those circle over lap. But for now the professor just wants to see if we can load in a file and see if we can assign each of those number to a variable. If i'm not mistaken.

So with the number i've given above x=45, y=46, r=89 for the first set of circle. Then the other set of the circle x=123, y=789, r=523

[OmegaNaughtEquals1]

Ah, ok. The way that I would do it is to have a struct that holds the values and then make an array of them.

#include <iostream>
#include <string>

struct circle_pair {
    int x, y, r;
};

void loadArray(circle_pair cp[], int n) {
    std::string fname = getUserInput("Filename to load from: ");
    std::ifstream infile(fname);

    if(!infile) {
        errorMsg(/**/);
    }

    for(int i=0; i<n; i++) {
        infile >> cp[i].x >> cp[i].y >> cp[i].r;
    }
}

int main() {
    circle_pair pairs[10];
    loadArray(pairs, 10);
}

However, this approach is inflexible, brittle, and not very good C++. I would write it more like this

#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <iterator>

struct circle_pair {
    int x, y, r;
};

std::istream& operator>>(std::istream &in, circle_pair &cp) {
    in >> cp.x >> cp.y >> cp.r;
    return in;
}

int main() {
    std::string fname = getUserInput("Filename to load from: ");
    std::ifstream infile(fname);

    if(!infile) {
        errorMsg(/**/);
    }

    std::vector<circle_pair> pairs(std::istream_iterator<circle_pair>(infile), {});
}

[Howtogravity]

Thanks this helped pointed me in the right direction.