CareerCup

Cannot dereference the void pointer in printf's
To print you have to use this way,
printf("int %d\n",*(int *)p);
Also for assinging have to assing in this format,
*(float *)p=30.5;
And then print as
printf("float %f\n",*(float *)p);

Note format specifier %f is used, %d will print wrong value.

char temp;
j=strlen(str);
for(i=0;i<j-1;i++)
{
temp = str[i];
str[i] = str[j];
str[j] = temp;
j--;
}

Version A: The stack should be efficient when pushing an item.

push:
enqueue in queue1
pop:
while size of queue1 is bigger than 1, pipe dequeued items from queue1 into queue2
dequeue and return the last item of queue1, then switch the names of queue1 and queue2

Version B:The stack should be efficient when popping an item

push:
enqueue in queue2
enqueue all items of queue1 in queue2, then switch the names of queue1 and queue2
pop:
deqeue from queue1