Pfthb

So this code gives us the prime numbers. But it only works if int a[1499] is a global variable because if an array is global it automatically initializes all the members to 0. How can I change the condition of the for-loop so that I can make a[1499] a local variable and move it to function main?

#include <iostream>

using namespace std;

int a[1499];

int main()

 int PrimeCounter = 0;
 int PrimeNumberNeeded = 1500;
 bool Isprime;
 int TestNumber = 2;

 a[0]=2;
 while (PrimeCounter != PrimeNumberNeeded)
 
 Isprime = true;

 for(int x=0; a[x]!= 0; x++)
 
 if(TestNumber%a[x] == 0)
 
 Isprime = false;
 break;
 
 
 if (Isprime)
 
 a[PrimeCounter] = TestNumber;
 PrimeCounter++;
 
 TestNumber++;
 
 // end of while
 if (PrimeCounter == PrimeNumberNeeded)
 
 cout << "Prime counter is: " << PrimeCounter << "nTest number is: "<< a[1499]<< endl;
 
 return 0;

Move the definition of a inside the function and give it an initializer:

int a[1499] = 0;

This explicitly initializes the first element to 0, and implicitly initializes the rest to 0 as well.