C programmer

I have an assignment for CS programming.. its about linux system. C program. 

I will attach the program details as a power point file. 

The due date is 5hours from now

Here is a hint about what I want to do ... 

Here is some code that declares the variables needed for each line:

float line_a_x1,line_a_x2,line_a_y1,line_a_y2;    

float line_b_x1,line_b_x2,line_b_y1,line_b_y2;

This code reads in data for one line from the keyboard (by default):

printf("Enter the two x,y pairs for line A: ");                

scanf("%f %f %f %f",&line_a_x1,&line_a_y1,&line_a_x2,&line_a_y2);

I want the work included these cases ...  

Case 1: Two normal sloped lines have different slopes. Intercepts

Case 2: Two normal sloped lines have same slope but different y-intercept. Doesn't intercept

Case 3: One vertical line (slope = 0) and one normal sloped line. Intercepts.

Case 4: Two vertical lines (slope = 0) with different x-intercepts. These x-intercepts would be the same as their x-position as with all vertical lines

Case 5: Two normal sloped lines with same x-intercept, y-intercept, and slope. Intercepts

Case 6: Two vertical lines (slope = 0) with same x-position/intercepts

Case 7: One vertical line and one dot (Only one position for dot, both ordered pairs have same position for dot). Doesn't intercept

Case 8: Two dots. Doesn't intercept.

Look for:

Normal lines

Vertical Lines (Slope = 0, X stays the same)

Horizontal Lines (Undefined slope, Y stays the same)

Dots (Undefined Slope, X & Y stays the same)