Created
January 14, 2013 21:08
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| List<string> _trace = new List<string>(); | |
| int SumNumbers(int from, int to) | |
| { | |
| _trace.Add(string.Format("SumNumbers ({0},{1}) : int {{", from, to)); | |
| if (from > to) | |
| { | |
| _trace.Add(string.Format("({0} > {1}) return 0 }}", from, to)); | |
| return 0; | |
| } | |
| _trace.Add(string.Format("int total = SumNumbers ({0}, {1})", from + 1, to)); | |
| int total = SumNumbers(from + 1, to); // recursive with next | |
| _trace.Add(string.Format("return from + total = {0} + {1} = {2} }}", from, total, from + total)); | |
| return from + total; // calculation | |
| } | |
| // Execution Output | |
| SumNumbers (1,3) : int | |
| { | |
| int total = SumNumbers (2, 3) | |
| SumNumbers (2,3) : int | |
| { | |
| int total = SumNumbers (3, 3) | |
| SumNumbers (3,3) : int | |
| { | |
| int total = SumNumbers (4, 3) | |
| SumNumbers (4,3) : int | |
| { | |
| (4 > 3) return 0 | |
| } | |
| return from + total = 3 + 0 = 3 | |
| } | |
| return from + total = 2 + 3 = 5 | |
| } | |
| return from + total = 1 + 5 = 6 | |
| } |
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