(Loop unrolling) 1) Are the following two pieces of code functionally equivalent? Assume the length of array a is always bigger than count. (30 points)

a) int count; int a[]; // int i =0 ; while (i

b) int count; int a[]; // i=0; while (i

if (i<=count-1) { a[count-1] = count -1; } if (i==count-2) { a[count-2] = count -2; }

2) Measure and compare the average performances of the above pieces of code by running each piece many times (e.g. count =1,000,000). Describe your method and results. Also attach your code (70 points).