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);

}

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