Thread: need help ASAP ,

  1. #1
    Registered User
    Join Date
    Apr 2007
    Posts
    14

    need help ASAP ,

    well ,,
    here is a function i search for the Max GPA in a tree , where :
    Code:
    struct treenode
    {
           int st_id;
           float gpa;
           ptrtotree left;
           ptrtotree right;
    };
    
    
    void MaxGPA(ptrtotree t,float max)         //here : float &max ?!!!
    {
         if(t!=NULL)
         {
                    if(t->gpa > max)
                    {
                                   max=t->gpa;
                    }
                    MaxGPA(t->left,max);
                    MaxGPA(t->right,max);
         }
    
    
    
    }
    
    // i am wondering how can i define the float max , or float *max ,
    
    void main
    {
        float max;

    need help ASAP
    thanks in advance

  2. #2
    Registered User
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    Austria
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    1,990
    Code:
    void MaxGPA(ptrtotree t,float max)         //here : float &max ?!!!
    This is c. It has to be
    Code:
    void MaxGPA(ptrtotree t,float * max)
    {
         if(t!=NULL)
         {
                    if(t->gpa > * max)
                    {
                                   *max=t->gpa;
                    }
                    MaxGPA(t->left,max);
                    MaxGPA(t->right,max);
         }
    }
    Kurt

  3. #3
    Officially An Architect brewbuck's Avatar
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    Location
    Portland, OR
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    7,396
    Is this a binary tree? As in, a tree where the left nodes are all less than the right nodes? Can you see the pointlessness of scanning the entire tree? Just find the rightmost child. By definition it will be the greatest.

  4. #4
    Registered User ssharish2005's Avatar
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    Sep 2005
    Location
    Cambridge, UK
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    1,732
    Ya, he could have put a if statment in main before calling MaxGPA function. Becuase, head node->gpa coule be < max or > max. If it is < then cleck only the left handside of the tree other wise the right handside of the tree.

    ssharish2005

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