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Top Forums Programming Help... runtime error in my maxheap sort program Post 302511214 by disaster on Wednesday 6th of April 2011 07:05:05 AM
Old 04-06-2011
Code:
#include<iostream>
using namespace std;
int *a,size,heapsize;
void maxheap(int *a,int j)
{
    int l,r,largest,temp;
    l=2*j;
    r=(2*j)+1;
    for(j=0;j<size;++j)
    {
        if(l<=heapsize && a[l]>a[j])
            largest=l;
        else
            largest=j;
        if(r<=heapsize && a[r]>a[largest])
            largest=r;
        if(largest!=j)
        {
            a[temp]=a[j];
            a[j]=a[largest];
            a[largest]=a[temp];
            maxheap(a,largest);
        }
    }    
}
void buildmax(int *a)
{
    heapsize=size;
    int n=size/2;
    for(int i=n;i>0;--i)
        maxheap(a,i);
}
void heapsort(int *a)
{
    int tempo;
    buildmax(a);
    for(int i=heapsize;i>0;--i)
    {
        a[tempo]=a[0];  
        a[0]=a[i];
        a[i]=a[tempo];
        --heapsize;
        maxheap(a,0);
    }
}
int main()
{
    cout<<"\nEnter the number of elements you want to enter in the array: ";
    cin>>size;
    int *a= new int [size];
    cout<<"\nEnter an array of elements: ";
    for(int i=0;i<size;++i)
        cin>>a[i];
    heapsort(a);
   /* cout<<"\nThe corresponding array is: ";
    for(int i=0;i<size;++i)
        cout<<a[i]; */
    buildmax(a);
    cout<<"\nThe sorted array is: ";
    for(int i=0;i<size;++i)
        cout<<a[i]<<"\t";
    return 0;
}

What do you consider "entering the array".
Anyways, in function heapsort you make use of an uninitialized int tempo, so I assume you will most likely have the error there
 

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TAU_MAPPING_CREATE(3)						  TAU Mapping API					     TAU_MAPPING_CREATE(3)

NAME
TAU_MAPPING_CREATE - Creates a mapping SYNOPSIS
C/C++: TAU_MAPPING_CREATE(char *name, char *type, char *groupname, unsigned long key, int tid); DESCRIPTION
TAU_MAPPING_CREATE creates a mapping and associates it with the key that is specified. Later, this key may be used to retrieve the FunctionInfo object associated with this key for timing purposes. The thread identifier is specified in the tid parameter. EXAMPLE
C/C++ : class MyClass { public: MyClass() { TAU_MAPPING_LINK(runtimer, TAU_USER); } ~MyClass() {} void Run(void) { TAU_MAPPING_PROFILE(runtimer); // For one object TAU_PROFILE("MyClass::Run()", " void (void)", TAU_USER1); cout <<"Sleeping for 2 secs..."<<endl; sleep(2); } private: TAU_MAPPING_OBJECT(runtimer) // EMBEDDED ASSOCIATION }; int main(int argc, char **argv) { TAU_PROFILE_INIT(argc, argv); TAU_PROFILE("main()", "int (int, char **)", TAU_DEFAULT); MyClass x, y, z; TAU_MAPPING_CREATE("MyClass::Run() for object a", " " , TAU_USER, "TAU_USER", 0); MyClass a; TAU_PROFILE_SET_NODE(0); cout <<"Inside main"<<endl; a.Run(); x.Run(); y.Run(); } SEE ALSO
TAU_MAPPING_LINK(3), TAU_MAPPING_OBJECT(3), TAU_MAPPING_PROFILE(3) 08/31/2005 TAU_MAPPING_CREATE(3)
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