tugas alpro 3 chapter -3

Top-Down Design with Functions 1. Develop your program solutions from existing information. Use the system documentation derived from applying the software development method as the initial framework for the program. ■ Edit the data requirements to obtain the main function declarations. ■ Use the refined algorithm as the starting point for the executable statements in the main function. 2. If a new problem is an extension of a previous one, modify the previous program rather than starting from scratch. 3. Use C’s library functions to simplify mathematical computations through the reuse of code that has already been written and tested. Write a function call (consisting of the function name and arguments) to activate a library function. After the function executes, the function result is substituted for the function call. 4. Use a structure chart to show subordinate relationships between subproblems. 5. Utilize modular programming by writing separate function subprograms to implement the different subproblems in a structure chart. Ideally, your main function will consist of a sequence of function call statements that activate the function subprograms. 6. You can write functions without arguments and results to display a list of instructions to a program user or to draw a diagram on the screen. Use a function call consisting of the function name followed by an empty pair of parentheses () to activate such a function. 7. Write functions that have input arguments and that return a single result to perform computations similar to those performed by library functions. When you call such a function, each actual argument value is assigned to its corresponding formal parameter. 8. Place prototypes (similar to function headings) for each function subprogram before the main function, and place the function definitions after the main function in a source file. Use (void) to indicate that a function has no parameters.