arrays

Question

I have a question about the sorting and arrays and I have to finish this for exam but really i am a new student in C and I don't have an idea how to do this: the question: Assume that you have a very long string and you are assigned to count the number of occurrences of each character that exists in the string. For example the string is this is supposed to be one damn long character array and the two output array should be this upoedbnamlgcry {2224912342135111121} Can you write the function that does this?

Vulpes · Answer

I think the second array is supposed to be the number of occurrences of each character in the same order as the first array. However there are some inaccuracies. For example there are 3 't's in the string and not 2 as shown in the second array. Also not sure whether code is required in C or C#? In C it would be: #include #include int main() { char char_array[40]; int char_count_array[40]; char s[] = this is supposed to be one damn long character array; int i = 0 j = 0 *pi; char c *pc; while (c = s[i]) { pc = strchr(char_array c); if (!pc) { char_array[j] = c; char_count_array[j] = 1; j++; } else { char_count_array[pc - char_array]++; } i++; } char_array[j] = '\0'; char_count_array[j] = 0; /* print out arrays */ printf(\); pc = char_array; while(*pc) printf(%c *pc++); printf(\n); printf({); pi = char_count_array; while(*pi) printf(%d *pi++); printf(\b}); return 0; } and in C#: using System; using System.Collections.Generic; class Program { static void Main() { string s = this is supposed to be one damn long character array; var charList = new List (); var charCountList = new List (); int index; foreach(char c in s) { index = charList.IndexOf(c); if (index == -1) { charList.Add(c); charCountList.Add(1); } else { charCountList[index]++; } } char[] charArray = charList.ToArray(); int[] charCountArray = charCountList.ToArray(); // print out arrays Console.Write(\); foreach(char c in charArray) Console.Write(c); Console.WriteLine(\); Console.Write({); for(int i = 0; i { Console.Write(charCountArray[i]); if (i } Console.WriteLine(}); Console.ReadKey(); } } The output in both cases is: this upoedbnamlgcry {3224912442135111241}

Shweta Lodha · Answer

dizar mejzini How are you calculating 2nd array: {2224912342135111121}

dizar mejzini · Answer

thanx for the code...