Question, Im very new

This is a discussion on Question, Im very new within the C Programming forums, part of the General Programming Boards category; Alright, I am planning on writing a program to encrypt text using the Caesar cipher. To do this I was ...

  1. #1
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    Question, Im very new

    Alright, I am planning on writing a program to encrypt text using the Caesar cipher. To do this I was planning on isolating each character and then performing the operations to encrypt on that character. However I do not know how to isolate that character from the inputed text.
    How would I do that?
    Is there a better way?

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    I am sorry, but I have never done any real programming. I know HTML and Basic pretty well. But that dose not compare to C.

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    ... kermit's Avatar
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    You need to learn how to walk before you run. Get a decent text on the C programming language, learn it, and then try your program. As for a text, since you have done some programming, I think The C Programming Language Second Edition, by Brian Kernighan & Dennis Ritchie might be good for you. It is pretty much the standard for C programming texts.

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    Quote Originally Posted by Penguinlord View Post
    Alright, I am planning on writing a program to encrypt text using the Caesar cipher. To do this I was planning on isolating each character and then performing the operations to encrypt on that character. However I do not know how to isolate that character from the inputed text.
    How would I do that?
    Is there a better way?
    There is no better way - the algorithm for an efficient Caesar cipher, is the same, in any language.

    in C, there are no strings - almost. Each char is already separated from the others, so instead of this, in BASIC:

    Code:
    FOR i = 1 TO LEN(string$) STEP 1
     mychar$ = MID$(string$, i, 1) 
    NEXT i
    
    C does this:
    char string[] = {"Once a jolly swagman"}; //compiler will count the spaces needed
    
    for(i = 0; i <= strlen(string); i++)  //you should #include <string.h> when using strlen()
      mychar = string[i];                      //the name of the array is it's base address in C
    
    
    //curly braces are optional if the parent expression has just one child 
    //expression:
    
    length = strlen(string);    //this is more efficient than re-calculating 
    for(i = 0; i <= length; i++) {  //strlen(string) within the for loop
      mychar = string[i];
    }
    Enjoy C, and welcome to the forum.

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    Registered User datainjector's Avatar
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    You need to learn how to walk before you run.
    sometimes you need to run to learn how to walk
    "I wish i could wish my wishs away"

    "By indirections find directions out" -- William Shakespears

    "Do what thou wilt shall be the whole of the law" -- Crowley "THE BEAST 666"

    Mizra -> love = Death...
    RDB(Rocks yooo)..

    http://www.cbeginnersunited.com

    Are you ready for the Trix ???

  6. #6
    Algorithm Dissector iMalc's Avatar
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    Quote Originally Posted by datainjector View Post
    sometimes you need to run to learn how to walk
    Err... no!
    If you were looking for an analogy to support that idea I would have used: "Sometimes you have to be thrown out of the nest to learn how to fly."

    But no, being thrown in the deep end in programming is seldom a good idea.
    My homepage
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  7. #7
    a_capitalist_story
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    Quote Originally Posted by iMalc View Post
    Err... no!
    If you were looking for an analogy to support that idea I would have used: "Sometimes you have to be thrown out of the nest to learn how to fly."

    But no, being thrown in the deep end in programming is seldom a good idea.
    And yet you'd think, with all the students coming in saying "Our teacher just gave this linked list assignment and doesn't teach us anything...so what's a loop?" it happens all the time.

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    As a former lifeguard and water safety instructor, I can tell you, it's not the way to learn to swim, either.

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