String File Input

I am trying to read a file to create the structures for a small 2d game.
I am reading in integer numbers to construct the walls.

At the moment I am using getline and have each number on a seperate line

Code:

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100
100
200
200

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But I want to be able to read each box (four walls) on the same line

Code:

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100 100 200 200

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What syntax can I do this with?

Below is my current code

Code:

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int i,j,readAmount;
        string inputLine;
       
        ifstream worldFile;
        worldFile.open("map.2d",ios::in );

        getline(worldFile,inputLine);
        readAmount = atoi(inputLine.c_str());
        for(j=0;j<readAmount;j++)
        {
                for(i=0;i<8;i++)
                {
                        getline(worldFile,inputLine);
                        rectWalls[i] = atoi(inputLine.c_str()); //converts inputLine string Var to integer, via c to c++ conversion
                }
                polygon(mapBuffer,4, rectWalls, makecol(255, 0, 0));
        }

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Use a string stream.

Read a whole line.
Initialise an istringstream foo with your input
Then do
while ( foo >> myint )

to extract each int in turn.