Parsing Data in C++

hola amigos. this is my goal, i'm reading a file into my program, each line resembles this (its for a graph project)

SOUCE : VertexA 1 VertexB 13 VertexC 8

where souce is the source vertex and the vertecies after the colon are adjacent vertecies. i am using getline to pull in each line of my input file. then i redirect each 'thing' into a string and the costs into an integer.. fine so long as i don't have more than one vertex after the source, how do i loop to run through til the end of the getline and then pull another line up after that?

code reads as this so far

Code:

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while( getline(in, oneLine) )
{

string source, colon, dest;
int cost;

in >> source;
in >> colon;//colon fall through
//HERE I Want to run my loop til oneLine is gone, but how??
while(oneLine){//THIS CAUSES ERRORS in G++
in>>dest;
in>>cost;
}//closes while one line

}//closes getline while loop

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this is obviously only to parse the input file and nothign more.. so any/all advice is appreciated.

You could do something like -

Code:

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#include <iostream>
#include <sstream>
#include <string>
using namespace std;

class vertices
{
private:
        class vertex
        {
        private:
                string name;
                int val;
               
                friend istream& operator >>(istream& is, vertex& ve)
                {
                        return is >> ve.name >> ve.val;
                }

                friend ostream& operator <<(ostream& os, const vertex& ve)
                {
                        return os << ve.name << ' ' << ve.val;
                }
               

        };

        vertex source;
        vertex adj[2];

        friend istream& operator >>(istream& is,vertices& ve)
        {
                string line;
                getline(is,line);
                stringstream ss;
                ss << line;
                string discard;
                ss >> discard >> discard >> ve.source >> ve.adj[0] >> ve.adj[1];
                return is;
        }

        friend ostream& operator <<(ostream& os, const vertices& ve)
        {
                return os << ve.source << ' ' << ve.adj[0] << ' ' << ve.adj[1];
        }

};


int main()
{

        vertices v;
        cin >> v;
        cout << v << '\n';       

        return 0;
}

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