CSC402 Homework 1 Solved

Objectives:

• Become familiar with basic Java program structure
• Become familiar with Java program elements:

  o Variable types
  o Operators and Expressions
  o Control structures
  o Input & Output statements (inc. StdIn, StdOut from the textbook) o Functions

• Be able to use Eclipse to create, debug and run basic Java programs.
• Be able to upload the required files to D2L.

  You are to write a Java program for each of the following problems. Name your projects as: csc402hw1a, csc402hw1b, csc402hw1c, csc402hw1d corresponding to problems a-d below.

  Once you have a program working, run it using the data indicated below, then copy/paste the console output into the top of your java source file in a comment block, right below your name. Upload the .java file to the submission folder.

A) Write a program to prompt the user for 2 floating point numbers, A & B. The program should print, on

separate lines:

• The sum of the two numbers A + B
• The difference of the two numbers A – B
• The quotient (first/second) A / B
• The quantity: AB, Hint pow( )

Input:

3.5 , 4.2

2. B)  Write a program to prompt the user for a positive integer, N. The program will repeatedly divide the input in half, discarding any fractional part, until it becomes 1. The program should print on separate lines:
   • the sequence of computed values, one per line
   • the number of iterations required
   • the value of log2(N)
3. C)  Write a program that will prompt the user to enter GPA values one per line, stopping when the user enters a negative value. Print the following on separate lines:
   • The number of valid GPAs entered.
   • The sum of the GPAs
   • The average GPA
4. D)  Write a function with one integer parameter, N. The function
   will compute and return the sum of the integers from 1 to N. Name the function: sumInts.

   Then write a complete program using this function. The main function will prompt the user for an integer, N. The main function will call the sumInts function for every value M from 1 up to N and print out:

• ThevalueM

• The result of sumInts(M)
• The value of (M+1)*M / 2

Input: 9

Run twice
Input1: 8 Input 2 19

Input: 4.0 3.7 2.9 3.5

-1

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