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problem2.js

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+//Function displayList is complete
+//Function displayList returns a string (a list of) of all test scores
+//stored in the parameter array named scores
+function displayList(scores)
+{
+    let s = ""
+    for(let loc=0; loc<scores.length; loc++)
+    {
+        if(loc<scores.length-1)
+            s = s+ scores[loc] +", "
+        else
+            s = s+ scores[loc]
+    }
+  return s;
+}
+
+
+// function hasImproved() takes as parameter an array of scores named scores.
+// This function returns TRUE if all scores are improving, returns FALSE otherwise.
+// scores are said to be improving if all scores in the list are greater than the
+// previous score. For example [50, 80, 90, 100] is improving since any given score
+// in the list is greater than the previous. On the otherhand, scores [90, 95, 85, 100] 
+// are not improving because 85<95
+function hasImproved(scores)
+{
+    //DO NOT WRITE ANY CODE HERE
+    for(let i=0; i<scores.length-1; i++)//5 6 8 9 4
+    {
+        for(let j=i+1; j<scores.length-2; j++)
+        {
+            if(scores[j]<scores[i])
+                return false
+        }
+    }
+  return  true
+}
+
+// function getAverage is complete.
+// This function takes an array of test scores and two integers, start and end.
+// getAverage returns the average of all scores starting at start and end 
+// at to inclusive. For example. if scores is [80, 85, 75, 90, 100, 50] and 
+// start=2 and end=4, getAverage will return the average of 75, 90 and 100
+function getAverage(scores, start, end)
+{
+    //DO NOT WRITE ANY CODE HERE
+    let sum=0;
+    for(let i=start; i<=end; i++)
+    {
+        sum = sum + scores[i]
+    }
+  return  sum/(end-start+1)
+}
+
+
+// ******************************** TASK 1 ***********************************
+// Function computeGrade() takes as parameters an array of student test scores 
+// named scores.
+// This function needs to return the average of this student. The average
+// needs to be computed according to the following rules:
+// 1. If the student has improve, the average is computed from the scores on the 
+//    second half of the list ONLY. If the list has odd number of scores, the extra score
+//    is part of the second half. For example, if the student test scores list is
+//    [50, 80, 85, 90, 95] the average should be calculated with scores [85, 90, 95]    use LabArrays for this, and use improve function for boolean :3
+// 2. If the student has not improved, the average score is calculated including 
+//    all the test scores
+function computeGrade(scores)
+{
+    if (hasImproved(scores)) {
+        let temparray = scores.slice(Math.ceil(scores.length / 2), scores.length)
+        return getAverage(temparray, 0, temparray.length-1)
+        
+    } else {
+        // console.log("nuh uh")
+        return getAverage(scores, 0, scores.length-1);
+    }
+}
+
+
+
+// ******************************** TASK 2 ***********************************
+// Write the code to calculate the average of the following test scores and 
+// display the data as shown in the sample run of the program shown in the 
+// WORD DOCUMENT.
+    // [95, 100, 80, 80, 100, 80, 60, 80, 90]
+    // [95, 60, 80, 80, 50, 80, 60, 80, 90]
+    // [95, 100, 75, 80, 80, 80, 60, 80, 75]
+// You MUST use the other given functions when completing this TASK
+
+let array = [85, 90, 96, 97, 98, 100]
+let array2 = [95, 60, 100, 80, 80, 85, 87, 90]
+let array3 = [95, 100, 75, 80, 80, 80, 60, 80, 75]
+
+console.log(`Test Scores: ${displayList(array)}`)
+console.log(`Average = ${computeGrade(array)}`)
+console.log()
+console.log(`Test Scores: ${displayList(array2)}`)
+console.log(`Average = ${computeGrade(array2)}`)
+console.log()
+console.log(`Test Scores: ${displayList(array3)}`)
+console.log(`Average = ${computeGrade(array3)}`)
+