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Henric Johansson
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Hello, I want to one day become a programmer. I've been programming home and never been educated in programming. I tried the Codility tool and was given the following assignment; ---- Equilibrium index of a sequence is an index such that the sum of elements at lower indexes is equal to the sum of elements at higher indexes. For example, in a sequence A: A[0]=-7 A[1]=1 A[2]=5 A[3]=2 A[4]=-4 A[5]=3 A[6]=0 3 is an equilibrium index, because: A[0]+A[1]+A[2]=A[4]+A[5]+A[6] 6 is also an equilibrium index, because: A[0]+A[1]+A[2]+A[3]+A[4]+A[5]=0 (sum of zero elements is zero) 7 is not an equilibrium index, because it is not a valid index of sequence A. If you still have doubts, this is a precise definition: the integer k is an equilibrium index of a sequence if and only if and . Assume the sum of zero elements is equal zero. Write a function int equi(int[] A); that given a sequence, returns its equilibrium index (any) or -1 if no equilibrium indexes exist. Assume that the sequence may be very long. ---- This is my answer (and it is correct); ---- int equi ( int[] A ) { int lSum = 0, hSum = 0; for(int i = 0; i < A.Length; i++) { lSum = 0; hSum = 0; for(int ii = 0; ii < i; ii++) { lSum += A[ii]; } for(int ii = A.Length - 1; ii > i; ii--) { hSum += A[ii]; } if(lSum == hSum) return i; } return 0; } ---- Would anyone share your comments on my coding style? What can I improve? Thankful for answers, Henric.
Toggle Commented Mar 11, 2010 on The Non-Programming Programmer at Coding Horror
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Mar 10, 2010