// Starter code for homework 8.  You are free to use this code in your
// programs.  However you are responsible for knowing what is does and
// for completing the documentation of it!

#include <stdio.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>

#define NDIM 3
#define MAXNAME 80

struct planet {
    double absolute_magnitude;
    double true_anomaly;
    double angle_of_perihelion;
    double angle_of_ascending_node;
    double inclination;
    double eccentricity;
    double semimajor_axis;
    char name[MAXNAME];
    // Add any other variables you want!
};

#define MAXPLANETS 1000    

int read_file(char *filename, struct planet P[]) {
    // Read the given file and put the information into the array of planets.
    // Return the number of planets in the list.
    FILE *fp;
    int nplanets;
    char line[200];

    fp = fopen(filename,"r");      
    if (fp==NULL) {
        fprintf(stderr,"File %s not found.\n", filename);
	abort();
    }

    nplanets = 0;    
    while (fgets(line,200,fp)!=NULL) {
        if (line[0]=='#') continue;     
	sscanf(line, "%lf %lf %lf %lf %lf %lf %lf",
	    &(P[nplanets].absolute_magnitude),
	    &(P[nplanets].true_anomaly),
	    &(P[nplanets].angle_of_perihelion),
	    &(P[nplanets].angle_of_ascending_node),
	    &(P[nplanets].inclination),
	    &(P[nplanets].eccentricity),
	    &(P[nplanets].semimajor_axis));
	strncpy(P[nplanets].name, line+74, MAXNAME);
	P[nplanets].name[MAXNAME-1] = '\0';
	nplanets++;     
	if (nplanets>=MAXPLANETS) break;
    }
    fclose(fp);      
    printf("Read %d planets from file %s.\n", nplanets, filename);
    return nplanets;
}

int main() {
    struct planet Planets[MAXPLANETS];
    int nplanets;
    nplanets = read_file("MPC_listing_of_TNO.v2.txt", Planets);
    // Elements Planets[0] to Planets[nplanets-1] are now filled with planet information.
    return 0;
}