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Home ► Lab Exercise ► Object Oriented Programming Lab Exercise Programs ► CPP Program for delete and new Operator Overloading▼
CPP Program for delete and new Operator Overloading |
Alogarithm steps:
Step 1: create the class loc.
Step 2: Declare the constructor loc .which initialize the member variables.
Step 3: Declare the delete and new operator functions with the keyword operator.
Step 4: Define the user specified operator’s behavior in operator function definitions.
Step 5: Create the objects for the class loc.
Step 6: Use the user defined operators for objects.
Step 7: Monitoring the output values.
CPP Program for delete and new Operator Overloading
#include
#include
#include
class loc
{
int longtitude,latitude;
public :
loc() {longtitude=latitude=0;}
loc (int lg,int lt)
{
longtitude=lg;
latitude=lt;
}
void show()
{
cout<< logitude << " ";
cout<< latitude <<"\n";
}
void *operator new(size_t size);
void operator delete(void *p);
void *operator new[](size_t size);
void operator delete[](void *p);
};
// new overloaded relative to loc
void *loc :: operator new(size_t size)
{
void *p;
cout<<"In overloaded new.\n";
p=malloc(size);
if(!p)
{
bad_alloc ba;
throw ba;
}
return p;
}
void loc :: operator delete (void *p)
{
cout<< "In overloaded delete. \n";
free(p);
}
//new overloaded for loc arrays.
void *loc :: operator new[](size_t size)
{
void *p;
cout<<"Using overload new[].\n";
p=malloc(size);
if(!p)
{
bad_alloc ba;
throw ba;
}
return p;
}
//delete overloaded for loc arrays.
void loc :: operator delete[](void *p)
{
cout<<"Freeing array using overloaded delete[]\n";
free(p);
}
int main()
{
loc *p1,*p2;
int i;
try
{
p1=new loc(10,20); //allocate an object
}
catch (bad_alloc xa)
{
cout<<"Allocation error for p1.\n";
return 1;
}
try
{
p2=new loc[10];
}
catch(bad_alloc xa)
{
cout<<"Allocation error for p2 .\n";
return 1;
}
p1->show();
for(i=0;i<10;i++)
p2[i].show();
delete p1;
delete [] p2;
return 0;
}
SAMPLE INPUT AND OUTPUT:
In overloaded new
Using overload new[].
10 20
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
In overloaded delete.
Freeing array using overloaded delete.
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