30 lines
978 B
C++
30 lines
978 B
C++
/*This C++ program to implement Sieve of Eratosthenes. The program initializes an integer array with all the elements initialized to 0. Then the algorithm follows where the each non-prime element’s index is marked as 1 inside the nested loops. The prime numbers are those whose value of index is marked as 0.*/
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/*
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* C++ Program to implement Sieve of Eratosthenes
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*/
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#include <iostream>
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const int len = 100;
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int main()
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{
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int arr[100] = {0};
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for (int i = 2; i < 100; i++)
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{
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for (int j = i * i; j < 100; j+=i)
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{
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arr[j - 1] = 1;
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}
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}
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for (int i = 1; i < 100; i++)
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{
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if (arr[i - 1] == 0)
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std::cout << i << "\t";
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}
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}
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/*
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1 2 3 5 7 11 13 17 19 23
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29 31 37 41 43 47 53 59 61 67
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71 73 79 83 89 97
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