Thread: how to find numbers in a char array.

  1. #1
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    Oct 2012

    how to find numbers in a char array.

    how to find numbers in a char array like
    Ex: [a,1,b,2,c,3] = [a,b,c,1,2,3]
    Ex2: [a1,b2,c3] = [a,b,c,1,2,3]


  2. #2
    and the hat of int overfl Salem's Avatar
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    Aug 2001
    The edge of the known universe
    Post something in an actual char array.

    char x[] = "abc123";
    char y[] = " [a,b,c,1,2,3]";
    Have different answers.

    You need to show us exactly how your notation maps to actual stored characters in a program.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

  3. #3
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    a char array contain ['a','1','b','2','c','3','d'] means output should be sort the alphabets and numbers like => abcd123
    so I have to find the integer in char array how could I separate that.

  4. #4
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    Jun 2005
    Sort the array. All the digits will be in a group (either before or after the letters, depending on character set supported by your compiler and host system). Shift that group to the end of the array if it is not already there.
    Right 98% of the time, and don't care about the other 3%.

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  5. #5
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    Oct 2012
    But how I can identify number and character in c?

  6. #6
    C++ Witch laserlight's Avatar
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    Oct 2003
    If you want to identify if a char is a digit, #include <ctype.h> and use isdigit, or check that the char is between '0' and '9' inclusive.
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