Q 1 write pograme in c++ for passbyvalue/passbyrefrence/passbyaddress .

#include<iostream>
using namespace std;

class passvalue
{

public:
    void passbyvalue(int x, int y); //pass by value
    void passbyrefrence(int &x, int &y);//pass by refrence.
    void passbyaddress(int *x, int *y); //pass by address.

};
void passvalue::passbyvalue(int x, int y)
{

x=10;
y=20;

}

//actual value will be changed .
void passvalue::passbyrefrence(int &x, int &y)
{
//passbyrefence :

cout<<"passbyrefrence called"<<endl;

x=60;
y=50;

}


//actual value will be changed .
void passvalue::passbyaddress(int *x, int *y)
{

cout<<"passbyaddress is  called"<<endl;
*x=70;
*y=80;

}

int main()
{
int i=40,j=30;
passvalue B;

cout<<"actual value"<<endl;
cout<<i<<endl<<j<<endl;

B.passbyvalue(i,j);

cout<<"passbyvalue called"<<endl;
cout<<i<<endl<<j<<endl;

cout<<"passbyrefrence  called"<<endl;

B.passbyrefrence(i,j);

cout<<i<<endl<<j<<endl;

cout<<"after pasaddress called"<<endl;
B.passbyaddress(&i,&j);
cout<<i<<endl<<j<<endl;

return 0;

}

Comments

Post a Comment

Popular posts from this blog

Dynamic Memory allocation in C++ for 1d, 2d and 3d array

#include <iostream> #define N 10 // Dynamically Allocate Memory for 1D Array in C++ int main() { // dynamically allocate memory of size N int* A = new int[N]; // assign values to allocated memory for (int i = 0; i < N; i++) A[i] = i + 1; // print the 1D array for (int i = 0; i < N; i++) std::cout << A[i] << " "; // or *(A + i) // deallocate memory delete[] A; return 0; } //2-Dimentional Array. // using single pointer; #include <iostream> // M x N matrix #define M 4 #define N 5 // Dynamically Allocate Memory for 2D Array in C++ int main() { // dynamically allocate memory of size M*N int* A = new int[M * N]; // assign values to allocated memory for (int i = 0; i < M; i++) for (int j = 0; j < N; j++) *(A + i*N + j) = rand() % 100; // print the 2D array for (int i = 0; i < M; i++) { for (int j = 0; j < N; j++) std::cout << *(A + i*N + j) << " ...
Read more

Write Your Own String Class:

class OwnString { private : char *string1 = NULL; int size; public: OwnString(void) { string1 = NULL; } OwnString(const char * strData) { size = strlen(strData); string1  = new char[size + 1]; int i = 0; while (*strData) { string1[i] = *strData; strData++; i++; } } OwnString & operator=(OwnString & obj) { if (this != &obj) { delete[]string1; size = obj.size; string1 = new char[size+1]; int i = 0; while (i<size+1) { string1[i] = obj.string1[i]; //strData++; i++; } } return *this; } OwnString (const OwnString & obj) { if (this != &obj) { delete[]string1; size = obj.size; string1 = new char[size + 1]; int i = 0; while (i < size + 1) { string1[i] = obj.string1[i]; //strData++; i++; } } } void print() { for (int i = 0; i < size; i++) { cout << string1[i]; ...
Read more

Calculating Daylight saving and UTC offset in QT

void getTimeZoneOffset() {     QString UTC_offset;     time_t current_time;     time(&current_time);     QString Daylighsaving ;     struct tm *timeinfo = localtime(&current_time);     double offset = (timeinfo->tm_gmtoff)/60;     if (timeinfo->tm_isdst)     {         offset += 60;         Daylighsaving = "1";     }     if (offset > 0)     {         offset = -offset;     }     else{         offset = -(offset);     }     UTC_offset = QString::number(offset); }
Read more