ASCII addition

This is a discussion on ASCII addition within the C++ Programming forums, part of the General Programming Boards category; Could somebody please tell me how to use a loop to encrypt a string by adding 1 to the ASCII ...

  1. #1
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    Talking ASCII addition

    Could somebody please tell me how to use a loop to encrypt a string by adding 1 to the ASCII value of each character in the string? EX "apple" to "bqqmf"? Thank You very much

  2. #2
    l'Anziano DavidP's Avatar
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    for(int x = 0; x < strlen(mystring); x++)
    {
    mystring[x]++;
    }
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    "Circular logic is good because it is."

  3. #3
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    Code:
    for(int x = 0; x < strlen(mystring); mystring[x++]++);
    Quidquid latine dictum sit, altum sonatur.
    Whatever is said in Latin sounds profound.

  4. #4
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    Question what if...

    what if it's on 'z' does it go to 'a'?
    • 0927
    • a.k.a 0 9 two 7

  5. #5
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    nope, in that case you might want something like this:
    Code:
    char EncryptChar(char ch)
    {
        if (ch == 'Z')  return 'A';  // that is if you care about uppercase
        if (ch == 'z')  return 'a';
        return ch + 1;
    }
    
    void EncryptString(char *str)
    {
        while (*str != '\0')   *str = EncryptChar(*str++);
    }

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