February 8th, 2013, 03:29 AM
Worked on this C++ function assignment for about 8 hours!!! Please post solution.
Calculate the first N emirp (prime, spelled backwards) numbers, where N is a positive number that the
user provides as input. An Emirp is a prime number whose reversal is also a prime. For example, 17 is a
prime and 71 is a prime, so 17 and 71 are emirps. Write a program that prints out the first N emirps,
five on each line.
For this assignment, you are required to make use of 2 functions (which you must write).
bool isPrime(int value); // Returns true if value is a prime number.
int reverse (int value); // Returns the reverse of the value (i.e. if value is 35, returns 53).
You should follow a top-down design, using these functions in conjunction with logic in main, to perform
the computation of N emirps and print them out according to the screenshot above. The general outline
for main would be as follows:
Step 1: Ask user for positive number (input validation)
Step 2: Initialize a variable Test to 2
Step 3: While # emirps found is less than the input:
Call isPrime with Test, and call it again with
reverse(Test). If both are prime, print and increment
number of emirps found.
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