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Ihteshamul Alam asked:

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I can write the code for "Sieve of Eratosthenes" to generate all the prime number up to n. But I want to write a program that will generate and index all the prime number (up to n) into an array, than check whether a number is prime or not. Can anyone please help me to do it?
 
For Example: if n = 10, than the prime number is 2 3 5 7. Index them into an array a[ ] = {2, 3, 4, 7}. Than write a program and press a number as input from keyboard, than check the number is prime or not. I know that there is a simple way to check whether a number is prime or not but I want to do it by the above way. How can I do that???
Tags: C++, C, prime

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