CareerCup

I dont think it is possible........

rather only the length common in both can be swapped

when you create an array of any type, the compiler creates a const pointer for the base address of that array. and since it is a const pointer you cannot modify the size of the array. And since you created the object as an array and not using a pointer to dynamically allocate the memory you cannot call delete [] on the array, therefore there is no way to change the size of the array.

Rather common Java question, since Java abstracts away realloc...

char[] swap(char a,char b)
{
char diff = a ^ b;
a=diff^arr2;
b=diff^arr1;
return new char[]{a,b};
}

void append(List<char> src,int start,List<char> dest)
{
dest.addAll(start,src);
}

void swap(List<char> arr1,List<char> arr2)
{
if(arr1.length==0 && arr2.length==0)return;

int i=0;

for(;i<arr1.length && arr1.length==arr2.length;i++)
{
char[] swapped = swap(arr1.get(i),arr2.get(i));
arr1.set(i,swapped[1]);
arr2.set(i,swapped[0]);
}



if(arr1.length > arr2.length)
{
append(arr1,i,arr2);
}

else if(arr1.length < arr2.length)
{
append(arr2,i,arr1);
}
}

In C We can not reallocate char aaa[] & bbb[];

we Can reallocate only char pointer

It is not possible to swap. You will get run time failure like stack is corrupted.

This will work, but we need to null terminate the strings properly after swap.

I tried in VS compiler.. It works fine.