Need help with my C programming lab. The text and header files are included. The

Question

Need help with my C programming lab. The text and header files are included. The exact instructions are the pictures below. Please use comments to explain key parts.

Header File:

#ifndef FIG_H
#define FIG_H
#include <stdio.h>
#define MAXLEN   16

#define OC_COLOR       0
#define OC_ELLIPSE       1
#define OC_POLYLINE       2     
#define OC_SPLINE       3
#define OC_TEXT           4
#define OC_ARC           5
#define OC_COMPOUND       6
// ARC SUB-TYPE
#define ST_OPEN_ENDED               1
#define ST_PIE_WEDGE                2
// ELLIPSE SUB-TYPE
#define ST_ELLIPSE_BY_RADII           1
#define ST_ELLIPSE_BY_DIAMETERS       2
#define ST_CIRCLE_BY_RADIUS           3
#define ST_CIRCLE_BY_DIAMETER       4
// POLYLINE SUB-TYPE
#define ST_POLYLINE                   1
#define ST_BOX                       2
#define ST_POLYGON                   3
#define ST_ARC_BOX                   4
#define ST_PIC_BOUNDING_BOX           5
// SPLINE SUB-TYPE
#define ST_OPEN_APPROX_SPLINE           0
#define ST_CLOSED_APPROX_SPLINE           1
#define ST_OPEN_INTERPOLATED_SPLINE       2
#define ST_CLOSED_INTERPOLATED_SPLINE   3
#define ST_OPEN_X_SPLINE               4
#define ST_CLOSED_X_SPLINE               5
// TEXT SUB-TYPE
#define ST_LEFT_JUSTIFIED       0
#define ST_CENTER_JUSTIFIED       1
#define ST_RIGHT_JUSTIFIED       2

enum ArrowType {STICK_TYPE, CLOSED_TRIANGLE, CLOSED_INDENTED, CLOSED_POINTED};
enum ArrowStyle {HOLLOW, FILLED};

typedef struct arrow_t {
   int active;
enum ArrowType type;
enum ArrowStyle style;
float thickness, width, height;
} Arrow;

typedef struct attribute_t {
   int line_style;
   int thickness;
   int pen_color;
   int fill_color;
   int depth;
   int pen_style;
   int area_fill;
   float style_val;
   int join_style;
   int cap_style;
   int radius;
   int direction;
   /* for text only */
   int font;
   double font_size;
   double angle;
   int font_flags;
   int justification;
   Arrow farrow, barrow;
} Attribute;

struct fig_config_t {
char orientation[MAXLEN];
char justification[MAXLEN];
char units[MAXLEN];
char papersize[MAXLEN];
float magnification;
char multiple_page[MAXLEN];
int transparent_color;
int resolution;
int coord_system;
   int tracing;
};

int fig_open(FILE *fp);
int fig_convert(double x);
int fig_userinfo(FILE *fp, int grid, char *title, char *author, char *date);

int fig_polyline(FILE *fp, int *x, int *y, int n,    char *astring);
int fig_box(FILE *fp, int *x, int *y, char *astring);
int fig_polygon(FILE *fp, int *x, int *y, int n,    char *astring);
int fig_arc_box(FILE *fp, int *x, int *y, char *astring);

int fig_spline(FILE *fp, int *x, int *y, int n, char *astring);

int fig_circle(FILE *fp, int cx, int cy, int radius, char *astring);
int fig_arc(FILE *fp, double cx, double cy, int *x, int *y, char *astring);
int fig_text(FILE *fp, int x, int y, char *string, char *astring);

#endif

Text file of circle dimentions:

5.65   1.92   0.74   2.49   3.19   1.22
4.13   4.11   1.32   7.39   6.52   0.56
1.41   6.62   1.29   1.26   7.20   0.66
1.69   6.50   0.84   5.44   0.84   0.80
5.53   2.86   1.09   3.59   2.89   1.49
8.31   4.62   0.62   2.26   5.57   1.11
8.24   5.08   1.13   5.69   1.20   0.72
1.60   6.02   0.71   8.00   5.56   0.99
8.30   1.60   1.12   6.67   4.70   0.62
1.52   3.08   1.45   7.12   1.53   1.50
3.30   3.69   1.30   4.51   3.42   1.28
6.81   1.53   1.19   8.87   7.46   0.58
7.66   4.44   1.24   5.98   6.66   1.40
1.99   3.42   0.98   2.17   1.56   0.96
7.10   1.34   0.56   7.94   1.91   1.19
1.98   5.34   1.21   4.42   7.51   0.53
8.09   3.53   0.54   9.84   4.03   0.76
5.81   2.97   1.40   5.77   2.36   1.32
5.23   5.73   0.67   5.19   3.90   0.63
1.52   4.85   1.43   3.55   3.85   1.30

3. Line Connecting Two Circles Read two circles whose center coordinate and radius as xo, yo, ro and x1,y1,ri. You will find a line segment (xa,ya) and (xbryb) to connect the circumference of two circles with the shortest length as shown in the figure below. you The test cases "labo3-testcases.txt" describes circles based on the unit of inches. You must convert the numbers to FIG unit using fig covert O function. For example, in FIG unit int cx,cy, rad; cx fig convert (5.5); convert inches to FIG unit cy fig convert (3.9) rad w fig convert (2.5) fig circle (stdout, cx, cy, rad, NULL);

Explanation / Answer

/* This program used to check shortest distance between 2 circles where we used fig_convert to convert "Inches" into Figure given dimension. We have also defined some constants for radious, (x,y) co-ordinate positions,radious, length etc in #define statements. Then we are calling respective functions to print them in a file. Those functions are fig_circle, fig_arc etc. which have its respective parameters. */

#ifndef FIG_H
#define FIG_H
#include <stdio.h>

// These are pre defined constants for your circle, radious etc.

#define MAXLEN   16

#define OC_COLOR       0
#define OC_ELLIPSE       1
#define OC_POLYLINE       2     
#define OC_SPLINE       3
#define OC_TEXT           4
#define OC_ARC           5
#define OC_COMPOUND       6
// ARC SUB-TYPE
#define ST_OPEN_ENDED               1
#define ST_PIE_WEDGE                2
// ELLIPSE SUB-TYPE
#define ST_ELLIPSE_BY_RADII           1
#define ST_ELLIPSE_BY_DIAMETERS       2
#define ST_CIRCLE_BY_RADIUS           3
#define ST_CIRCLE_BY_DIAMETER       4
// POLYLINE SUB-TYPE
#define ST_POLYLINE                   1
#define ST_BOX                       2
#define ST_POLYGON                   3
#define ST_ARC_BOX                   4
#define ST_PIC_BOUNDING_BOX           5
// SPLINE SUB-TYPE
#define ST_OPEN_APPROX_SPLINE           0
#define ST_CLOSED_APPROX_SPLINE           1
#define ST_OPEN_INTERPOLATED_SPLINE       2
#define ST_CLOSED_INTERPOLATED_SPLINE   3
#define ST_OPEN_X_SPLINE               4
#define ST_CLOSED_X_SPLINE               5
// TEXT SUB-TYPE
#define ST_LEFT_JUSTIFIED       0
#define ST_CENTER_JUSTIFIED       1
#define ST_RIGHT_JUSTIFIED       2

enum ArrowType {STICK_TYPE, CLOSED_TRIANGLE, CLOSED_INDENTED, CLOSED_POINTED};
enum ArrowStyle {HOLLOW, FILLED};

typedef struct arrow_t {
   int active;
enum ArrowType type;
enum ArrowStyle style;
float thickness, width, height;
} Arrow;

typedef struct attribute_t {
   int line_style;
   int thickness;
   int pen_color;
   int fill_color;
   int depth;
   int pen_style;
   int area_fill;
   float style_val;
   int join_style;
   int cap_style;
   int radius;
   int direction;
   /* These are some attributes to show arrow in circle*/
   int font;
   double font_size;
   double angle;
   int font_flags;
   int justification;
   Arrow farrow, barrow;
} Attribute;

struct fig_config_t {
char orientation[MAXLEN];
char justification[MAXLEN];
char units[MAXLEN];
char papersize[MAXLEN];
float magnification;
char multiple_page[MAXLEN];
int transparent_color;
int resolution;
int coord_system;
   int tracing;
};

// This opens a file to print output

int fig_open(FILE *fp);

// fig_convert function used to change INCHES to given unit
int fig_convert(double x);

// These below functions calls their respective functions with given parameters and prints result.
int fig_userinfo(FILE *fp, int grid, char *title, char *author, char *date);

int fig_polyline(FILE *fp, int *x, int *y, int n,    char *astring);
int fig_box(FILE *fp, int *x, int *y, char *astring);
int fig_polygon(FILE *fp, int *x, int *y, int n,    char *astring);
int fig_arc_box(FILE *fp, int *x, int *y, char *astring);

int fig_spline(FILE *fp, int *x, int *y, int n, char *astring);

int fig_circle(FILE *fp, int cx, int cy, int radius, char *astring);
int fig_arc(FILE *fp, double cx, double cy, int *x, int *y, char *astring);
int fig_text(FILE *fp, int x, int y, char *string, char *astring);

#endif

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