38: Highlights

• When you work with C, as with most programming languages, you write source code, the C compiler translates source code into object code, the C linker then links object code into executable code, and your computer runs that executable code.
• C functions contain sequences of computation-specifying statements.
• All C programs contain a function named main. When you run a C program, you initiate the computations specified in that main function.
• Many statements involve built-in functions and operators such as the display function, printf, and the addition operator, +. Operators do their work on operands.
• To test simple programs, you often use data that you supply when you write the program. Such data are said to be wired in.
• If you plan to use the display function, then you must inform C of your intention by including the following line near the beginning of your program:

  #include  
  

• If you want to display characters, then instantiate the following pattern:

  printf ("characters to be displayed"); 
  

• If you want to display an integer, then instantiate the following pattern:

  printf ("%i", integer-producing expression); 
  

• If you want to terminate the current line and to start a new one, then instantiate the following pattern:

  printf ("\n");