missed

2018-19-1-04/Megoldás/script.js

@@ -0,0 +1,29 @@
+var counter = 1;
+
+function newliner(){
+    counter += 1;
+    var child = document.getElementById("sample");
+    child = child.cloneNode(true);
+    child.id = "";
+    child.children[0].textContent = counter;
+    child.children[1].children[0].value = "";
+    child.children[2].children[0].value = "";
+    child.children[3].children[0].value = 0;
+    document.getElementById("MainTable").appendChild(child);
+    updateaverage();
+}
+
+function updateaverage(){
+    var marks = Array.from(document.getElementsByClassName("marks"));
+    var avg = 0;
+    for(var i = 0; i < marks.length; i++){
+        if(Number(marks[i].value) == 0){
+            avg += 1
+        }else{
+            avg += Number(marks[i].value);
+        }
+    }
+    avg = Math.floor((avg * 100) / marks.length);
+    avg = avg / 100;
+    document.getElementById("average").textContent = `Az átlag: ${avg}`;
+}