Program files

A. Describe the structure of a C program. B. Describe the process of creating and executing a C program under UNIX system. C. How do we implement multiple source program files? D. Find errors, if any, in the following program:

E. Find errors, if any, in the following program:

F. Find errors, if any, in the following program:

G. Write a program to display the equation of a line in the form

                                            ax + by = c

for a = 5, b = 8 and c = 18.