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String manipulation Problem

Discussion in 'C' started by katkat21, Aug 11, 2009.

  1. katkat21

    katkat21 New Member

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    can someone solve my problem

    if the string is college
    the output must be
    c=1
    o=1
    l=2
    e=2
    g=1

    it counts that how many a letter does it used
    thnk you ^^:)
     
  2. xpi0t0s

    xpi0t0s Mentor

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    I'd probably use an array of 26 ints initialised to zero, then for each letter encountered increment the relevant element. Pseudocode:
    Code:
    int arr[26] initialise to zero
    char *str="college"
    for each character c in str
      arr[str[c]-'a']++
    end for
    for each element e of arr
      if non-zero
        print the letter (e+'a') and the count
      end if
    end for
    
    arr[str[c]-'a']++ is the clever bit: str[c] is a char between 'a' and 'z', and subtracting 'a' from that gives us a number from 0-25 which we use as the index into the array. It may be a good idea to add some limits checking to this, for example if (str[c]>='a' && str[c]<='z') so that you don't accidentally increment something not in the array.
     

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