copy_n

Author: keineahnung2345

vector_copy_part.cpp

@@ -0,0 +1,31 @@
+#include <vector>
+#include <algorithm> //copy, copy_n
+#include <iterator> //advance
+#include <iostream>
+using namespace std;
+
+//https://stackoverflow.com/questions/13760174/replacing-subvector-in-a-vector
+
+int main() {
+    vector<int> vec1 = {1,2,3,4};
+    vector<int> vec2 = {5,6,7,8,9,10};
+    
+    int n = 1;
+    vector<int>::iterator dst = vec2.begin();
+    advance(dst, n);
+    
+    //Method 1: copy
+    copy(vec1.begin(), vec1.begin()+3, dst);
+    
+    //Method 2: copy_n
+    copy_n(begin(vec1), 3, dst);
+    
+    for(int e : vec2){
+        cout << e << " ";
+    }
+    cout << endl;
+    
+    return 0;
+}
+
+//5 1 2 3 9 10