/*************************** NOT MY OWN IDEA, FOLKS ***************************/ //works better in Code::Blocks, I suggest you download it, go to Chapter 1, Lesson 3 in the C++ tutorial for more info. //if you do have Code::Blocks, remove the "//" behind "while(true) {" and its closing curly brace at line 52 to enter as much inputs as you like. //thank you for checking it out!! //constructive criticism, welcome. Upvote, tolerated. #include #include using namespace std; int main() { //while(true) { int limit, checker = 3, divved = 2, remn; int lines = 30, timesWritten = 1, endLines; cout << "Please enter a number greater than 1 to see primes printed on the screen to, including and not exceeding that number." << endl; cout << "(also enter \"clear\" or \"cls\" to clear screen)" << endl; string input; cin >> input; if (input == "clear" || input == "cls") { system("CLS"); } limit = atoi(input.c_str()); if (limit > 1) { cout << endl << 2 << endl; while(checker <= limit) { remn = checker % divved; if (checker == divved) { cout << checker++ << endl; divved = 2; timesWritten++; } else if (remn == 0) { checker++; divved = 2; } else { divved++; } } endLines = lines - timesWritten - 5; int i; for(i=0;i= endLines) { cout << endl << endl; } } else if (limit < 2 && input != "clear" && input != "cls") { cout << endl << "No can do, please try again. " << endl; system("PAUSE"); system("CLS"); } //} return 0; }

All Primes from 2 to Input