Hello Pls solve my problem..How to add,subtract,multiply & divide 2 numbers?without..

This is a discussion on Hello Pls solve my problem..How to add,subtract,multiply & divide 2 numbers?without.. within the C Programming forums, part of the General Programming Boards category; Hello, how can you add,subtract,multiply and divide 2 numbers without using Arithmatic operators (+,/,*,-,%,++,--) i have a basic idea that ...

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    Hello Pls solve my problem..How to add,subtract,multiply & divide 2 numbers?without..

    Hello,
    how can you add,subtract,multiply and divide 2 numbers without using Arithmatic operators (+,/,*,-,%,++,--)

    i have a basic idea that it can be done using bitwise operator but how that i don't know! can anybody provide me a solution?please?

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    C++まいる!Cをこわせ! Elysia's Avatar
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    And why would you do that?
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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    it's my question! what will i do or not that's a different thing
    if you know you may answer if you don't then fine, even i don't know just wait like me. Let the other big heads come and give the solution

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    Registered User rogster001's Avatar
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    i think you should chill your beans a bit matey

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    Ok fine! but is this a question to ask?
    what will you do by that?? what will i do? i can do nothing from that it's just for my information purpose i want to know

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    It's better if you ask clear question to get a clear answer.

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    This is an example of the answer. It's called Bit Shifting. In this example YELLOW, etc., are just defines for numbers, the << is the bit shifting operator, and the 4 is the number of bits that are being shifted. Google that, and you'll be good to go. Might be in the forum FAQ, as well.

    textattr(YELLOW+(RED<<4));
    textattr((CYAN<<4) + RED + BLINK);

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    Quote Originally Posted by Adak View Post
    textattr(YELLOW+(RED<<4));
    textattr((CYAN<<4) + RED + BLINK);
    and what for have you used + operator? i dont want any arithmatic operator. Just use bitwise operators like &,~,|,^(And,Complement,Or,XOR)

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    C++まいる!Cをこわせ! Elysia's Avatar
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    If you explained why, perhaps someone could better easily find a solution.
    Emulating all the arithmetic operators isn't easy and more complex that it actually solves, so hence the question again, why?
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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    Quote Originally Posted by chottachatri View Post
    and what for have you used + operator? i dont want any arithmatic operator. Just use bitwise operators like &,~,|,^(And,Complement,Or,XOR)
    I wasn't giving a full and complete answer to the question, I believe that was obvious since I mentioned the need to google & check our FAQ.

    The process of learning becomes quite trivialized if you answer every student's question, fully. They have brains, they are problem solvers; a few clues in the right direction is sufficient.

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    C++ Witch laserlight's Avatar
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    I shall unashamedly link you to the Wikipedia article on binary adders.
    C + C++ Compiler: MinGW port of GCC
    Version Control System: Bazaar

    Look up a C++ Reference and learn How To Ask Questions The Smart Way

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    Chinese pâté foxman's Avatar
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    how can you add,subtract,multiply and divide 2 numbers without using Arithmatic operators (+,/,*,-,%,++,--)
    Code:
    int add(int a, int b)
    {
       __asm
       {
          push eax
          mov eax, a
          add b, eax
          pop eax
       }
    
       return b;
    }
    No + sign used...

    By the way, the "++" operator is just a way to say "x = x + 1". It's an addition and an affection operator all in one.

    With the link laserlight posted, you now should have some idea about how to implement addition. Once you done that, other operators will mostly be cake.

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    C++ Witch laserlight's Avatar
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    No + sign used...
    But you are using an arithmetic instruction. If indeed the list of what is forbidden was exhaustive, then implementing add() with operator+= would be even simpler, heheh.

    It's an addition and an affection operator all in one.
    I have never heard of "affection" used in this context. Do you mean "assignment" instead?
    C + C++ Compiler: MinGW port of GCC
    Version Control System: Bazaar

    Look up a C++ Reference and learn How To Ask Questions The Smart Way

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    C++まいる!Cをこわせ! Elysia's Avatar
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    Yeah, it's just the assembly equalient of the C/C++ code. I'd call that cheating
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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    Chinese pâté foxman's Avatar
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    Hey, he asked not to use any arithmetic operator, and i don't see any use of it in the code i gave.

    I have never heard of "affection" used in this context. Do you mean "assignment" instead?
    My mistake, i did mean assignment. Doesn't make a lots of sense: i didn't write correctly the word i was thinking of and even that word doesn't exist in English (it's not my first language).

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