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Suppose there is a txt file with following format:Student name Grades in subjectsX ABA+CDA+Y B+CAA+AAthere can be many students with there grades in various subjects. (number of subjects are unknown)Possible values of grade are: A, A+, B, B+, C, D now suppose the file gets corrupted and all '+' are replaced by 'A'Write a program to restore the file
MumblesCrzy
- Sep 24th, 2009
So I don't know if it's possible to make a perfect program, but one that can get a close estimate would go as such.If all the +'s in the files have been changed to A's then the two exa...
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Is it possible to implement Polymorphism (either compile time / runtime) in “C” ? If yes how?
Ashwan
- Jul 26th, 2007
Dont have as such idea whether we can explicitly implement the Polymorphism or not.....but internally it gets done incase of "C".Consider the example of printf/scanf.? Both are library functions and?...
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How can I instantiate only three instances of an application ?If I open 4th instance, I have to close 1st instance like wise if I open 5th one I have to close 2nd one automatically ?
newlife
- Sep 24th, 2009
This can be done using one static variable which will keep account of object and a list which has object reference. In constructor check if static variable is 4 then remove one object from list and ad...
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Count Number of characters using Pointers
Write a program to count the number of characters in a string using pointers.
madhuti
- Sep 29th, 2009
Int main(void) { char* str = "Hellolklklk"; int i=0; for(i=0; *str; i++, str++); printf("count= %dn", i);return 0;}
paindriven
- Jun 12th, 2009
unsigned int charCounter(char const* str){ unsigned int counter = 0; char const* data = str; while (data != NULL && *data != '') { data++; counter++; } return counter;}
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How will you detect if there is memory leak in your C++ program?
vijay.badola
- Oct 4th, 2009
In LINUX environment one can use VALGRIND and MPATROL free tools to find out possible memory leaks in programs.
santhosh.kanchanapally
- Feb 18th, 2009
By overloading the new and delete operators, we can find the memory leaks as shown in following program ,#include "stdafx.h"#include <iostream>#include <string>using namespace st...
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Reversing Linked List
How to reverse a linked list using only one pointer?
jjoshi
- Oct 9th, 2009
Void revshow(){struct node *p;int temp[100],count=0,i;p=head;for(i=0;p!=NULL;i++,p=p->next)temp[i]=p->num;for(i=i-1,p=head;p!=NULL;i--,p=p->next)p->num=temp[i];}
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Concatenate two circular linked lists
Write a program to concatenate two circular linked lists into a single circular list.
j_l_larson
- Oct 19th, 2009
class node {public: node(int n) : m_n(n) { m_pNext = this; } ~node() {} void SetNext( node* p ) { m_pNext = p; } node* GetNext() const { return m_pNext; }&n...
Bhimasena
- Jul 13th, 2009
Void cat(Node* ll1, Node* ll2){Node* temp = ll1->next;ll1->next = ll2->next;ll2->next = temp;}
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Find nth node from end of a singly linked list
j_l_larson
- Oct 19th, 2009
node*GetNthFromEnd(node* pHead, int n) { if ( ! pHead ) return NULL; int i = 0; node* p = pHead; node* ...
Apoorv
- Feb 16th, 2007
A simple way out would be..Use two pointers..*traverse and *nth_positionboth initialised to null..While you traverse to the end of the list using *traverse,let *nth_position follow only after n iterat...
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DLL Application
What are DLLs? How they are used in the applications?
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We can overload assignment operator as a normal function.But we can not overload assignment operator as friend function why?
sachin_mundhra
- Dec 18th, 2009
Because assignment operator is one of the default method provided by the class.
sumanjit
- Sep 15th, 2005
If the operation modifies the state of the class object, it operates on, it must be a member function, not a friend fucntionThus all operator such as =, *=, +=, etc are naturally defined asmember func...
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What is the difference between operator new and the new operator?
sachin_mundhra
- Dec 18th, 2009
Operator new works like malloc. Example:int *n; n = (int*) operator new(sizeof(int)); New Operator does the following:1) Calculate the memory 2) Allocate memory using operator new 3) Call the Constructor
satheesh83
- Oct 16th, 2009
New operator allows to allocate a memory from the heap, so a new instance of a class is created but operator New is used to overload the (new) operator just like overloading of other operators. A...
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What is placement new?
sachin_mundhra
- Dec 18th, 2009
Using placement new operator user can allocate memory in a specific memory address. Example: SomeClass at a particular memory address stored in a pointer type variable named pmem new(pmem) SomeClass;
vidhudatta
- Sep 23rd, 2009
Placement syntax allows programmers to explicitly specify memory management of objects. The placement versions of new operator is called placement new.
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Invoke the virtual toString() function
To invoke the virtual toString() function defined in GeometricObject from a Circle object c, use :A. ((GeometricObject*)c)->toString();B. c.super.toString()C. (GeometricObject*)c->toString();D. c->GeometricObject::toString()
vijay.badola
- Dec 31st, 2009
If we take the following class definitions:class CGeometricObject{public:virtual void toString(){ printf("I am in base");}};class Circle : public GeometricObject{public:void toString(){...
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What should you do gain access to Private Base Class Data
tapan.gajera
- Jan 3rd, 2010
B. You should use a public or protected base class function.Example: class Base{private: int a;public: Base() {a = 5;} &nbs...
j_l_larson
- Oct 19th, 2009
F. None of the above are entirely the right answerYou can provide a method in the base class to allow the private data to be read or written and then provide an access specifier in the derived class w...
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Arithmetic Operations using Operator Overloading
Write a program for all the four arithmetic operations in float data type using operator overloading concept.
harsha419
- Jan 21st, 2010
Addition Operator:-----------------------------------------------------Complex operator +( const Complex &temp){ Complex ctemp; ctemp.m_real = m_real+ temp.m_real; ctem...
avinashk60
- Jan 19th, 2010
const ComplexNo& ComplexNo::operator+(const ComplexNo &b) { ComplexNo &result = *this; i = i + b.i; j = j + b.j; return result; };
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How copy constructor works?
sachin_mundhra
- Jan 28th, 2010
Copy Constructor :- This is among one of the default method of class.Base a;Base b = a ; // Here Copy constructor gets called.Here a new instance of class Base will be created and object a data will be copied in object b.Sachin Mundhra
Raju
- Mar 20th, 2007
Copy Constructor uses class name as reference .., it is used to declare and Initialize an object from another object. i.e It is used to create a new object from existing object of same class.
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Explain how static class member initialized?
sachin_mundhra
- Jan 28th, 2010
Example :- class Base{public:static int data;};int Base :: data = 10 ; // static class member gets initialized.
yzesong
- Jul 31st, 2009
Static variables of a class can only be initialized like this CLASS_NAME::STATIC_VAR_NAME = VAR_VALUE;
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What is difference between inline function and ordinary function?
sachin_mundhra
- Jan 28th, 2010
Inline function should be small in terms of line of code. Complier will replace the code whenever inline function gets called.
wow_suraj
- May 2nd, 2008
In case of ordinary function, when calling the function the scope jumps to the function and after return jumps back to the function call statement resulting in some extra execution time. While in case...
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What is the difference between a pointer and a reference?
sachin_mundhra
- Jan 28th, 2010
Pointer can be NULL but reference cannot be NULL.For example, If you write int &a; // This will give compile error, because reference cannot be NULL.
pammi_11
- May 10th, 2008
Pointer holds the address of a variable.reference holds the address of duplicate of that variable.
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Will the program run successfully?
Main(){ int a=2.9; float b=9; cin>>"%d %f">>a>>b; return();}
joanne.perater
- Feb 7th, 2010
This will generate compiler errors and a warning.A warning in lineint a = 2.9; //should use a typecast to convert to intand a compiler error in linecin >> "%d %f" >> a >> b; // cin does not take a right hand operand of const char
joanne.perater
- Feb 7th, 2010
This will generate compiler errors and a warning.A warning on lineint a = 2.9; // should use a typecast to convert to intand a compiler error on linecin>>"%d%f" >> a >> b; //cin does not take a right hand operand of const char
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