Need To generate the factorial of No Greater Than 10 In C - Page 3
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Thread: Need To generate the factorial of No Greater Than 10 In C

  1. #21
    Junior Member
    Join Date
    Feb 2004
    Posts
    4

    Cool

    First Message. Here is a part of my program. You can calculate 10000!, maybe more.
    I am cutting code.

    #define Max_Digit 20000 // May be changed by memory
    #define Base 10 // 256 is confortable
    struct GreatNumber{
    public:
    int digits[Max_Digit];
    int decflag;
    int positionflag;
    }stemp,sptemp,temp2;

    GreatNumber Mult(GreatNumber X, GreatNumber Y)
    //Spider-Multiplication of numbers By:Slayerchange
    {
    int log1=0,log2=0,log3=0,log4=0,artik=0,deger=0;
    log2=Y.positionflag+1;
    log4=X.positionflag+1;
    NullNumber(sptemp);
    NullNumber(temp2);
    for(log1=0;log1<=log2;log1++)
    {
    for(log3=0;log3<=log4;log3++)
    {
    deger=Y.digits[log1]*X.digits[log3]+artik;
    if(sptemp.digits[log1+log3]+deger<Base){
    sptemp.digits[log1+log3]+=deger;
    artik=0;
    deger=0;}
    else{
    deger+=sptemp.digits[log1+log3];
    sptemp.digits[log1+log3]=deger%Base;
    artik=(deger-deger%Base)/Base;
    }
    }
    SetPosition(sptemp);
    temp2=sum(temp2,sptemp);
    NullNumber(sptemp);
    }
    return temp2;
    }
    //Some functions here irrevelent.You can delete them. Here is fakto.
    void Fakto1000(void)
    //1000!
    {
    GreatNumber A,B,C;
    NullNumber(A);
    NullNumber(B);
    NullNumber(C);
    A.digits[5]=1;
    B.digits[0]=1;
    C.digits[0]=1;
    SetPosition(A);
    SetPosition(B);
    SetPosition(C);
    do{
    Inc(B,0,1);
    C=Mult(C,B);
    shownumber(B);
    cout<<"\nFakto=";
    shownumber(C);
    }while(!Equal(A,B));
    }

  2. #22
    Senior Member
    Join Date
    Jul 2002
    Posts
    339
    First Message. Here is a part of my program. You can calculate 10000!, maybe ore.
    I am cutting code.
    Ain't you cutting too much code? I can't see any definitions for SetPosition(), NullNumber() and shownumber(). Can you explain a bit about your code?

    Peace always,
    <jdenny>
    Always listen to experts. They\'ll tell you what can\'t be done and why. Then go and do it. -- Robert Heinlein
    I\'m basically a very lazy person who likes to get credit for things other people actually do. -- Linus Torvalds


  3. #23
    Junior Member
    Join Date
    Feb 2004
    Posts
    4

    Cool

    Sorry ,
    INC(A,x,y):
    Increase A[x] by y
    NullNumber:
    for all x upto Max_Digit , let A[x]=0
    SetPosition:
    Numbers are added into A[x] from left to write. Return , number's digit.
    shownumber:
    cout A[x] up to positionflag.
    Here is the full-testing program. mult2() function and some of them are for testing ,you can delete them all.

  4. #24
    Junior Member
    Join Date
    Feb 2004
    Posts
    4

    Cool

    Please look this site. You will find lots of interesting program codes.

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