Object-Oriented Programming in C++

Homework 1 Csc309.

Due Monday April 3, 2006 by 11:59pm.

Problem 1

(25 points)

From the Kalin text. Write a program that reads nonnegative integers and then outputs Yes if the numbers do not decrease and No otherwise. (The numbers do not decrease if, for every pair n₁, n₂ in succession, we have n₁≤ n₂.

Examples

If the input is ..

0 14 14 27 78 

The output is .. yes

If the input is ..

0 3 1 7 29 

The output is No

Assume a negative integer marks the end of the input.

Problem 2

25 points

Get the program primes.cpp. For practice, I would suggest typing in the code. For this problem instead of printing the primes to the console store them in a vector.

Next, traverse the vector and print a two column table showing all the twin primes less then or equal to the number that was input. Twin primes are two primes that differ by two. Ex ( 5, 7 and 17, 19 ).

Sample Run

    Enter a positive integer:
    49

    Twin Primes

     3     5
     5     7
     11    13
     17    19
     29    31
     41    43

Turn in Instructions

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