Create Sieve of Eratosthenes.cpp

Created Siever_of_Eratosthenes.cpp

others/Sieve of Eratosthenes.cpp

@@ -0,0 +1,14 @@
+void sieveoferatosthenes(vector<ll>a,ll x){
+	bool prime(x+1,true);
+
+	for(ll i=2;i*i<=x;i++){
+		if(prime[i]==true){
+			for(ll j=i*i;j<=x;j+=i){
+				prime[i]=false;
+			}
+		}
+	}
+	for(ll i=2;i<=x;i++){
+		if(prime[i])a.push_back(i);
+	}
+}