1. What is the main function?
2. What is compilation and linking (of a C-program)? What is source code, object code, executable code?
3. How do you compile and link a C-program which is wholly contained in one file, say main.c?
4. How do you run the resulting executable code?
5. How do you tell the compiler the description of the printf function? Why do you need to do this?
6. How do you link the printf function?
7. What is stdio.h?
8. Why angle-brackets in #include<stdio.h>?
9. Where can you get the description of the printf function (the more possibilities you name, the better)?
10. What are the primitive data types for numbers in the C-language?
11. Do you need to declare a variable before use in the C-language? In the Octave/MATLAB language?
12. Can a variable hold values of different types in the C-language? In the Octave/MATLAB language?
13. Is there any difference in how the binary operators (*,/,+,-) work in the C-language and Octave/MATLAB? For example, what is 1/2 in C and in MATLAB/Octave?
14. How do you run an Octave script in the batch mode?
15. How do you write to a terminal from an Octave script?

1. declares variables of types int, float, double, long double, double complex, long double complex;
2. assigns some values to these variables;
3. applies some binary operations to these variables and stores the results in new variables;
4. prints the values of the new variables to the standard output with five decimal places using printf function.

• There is no built-in format for complex numbers, you have to print separately the real and the complex parts using creal (double), creall (long double), cimag (double), and cimagl (long double) functions.
• The header file complex.h defines the imaginary unit as I.
• You can get the manual page for the printf function with the command man 3 printf although the abovementioned wikipedia article https://en.wikipedia.org/wiki/Printf is probably a bit more readable.

long double x = 0.7777777777777777777777777777L;