History of Qt

Qt is developed by an open source project, the Qt Project, involving developers as individuals and from firms working to advance Qt, such as Nokia, Digia, and others. Before the launch of the Qt Project, it was produced by Nokia’s Qt Development Framework division, which came into being after Nokia’s acquisition of the Norwegian company Trolltech, the original producer of Qt. In … More History of Qt

What is Qt?

Qt (“cute”, or unofficially as Q-T cue-tee) is a cross platform Application Framework that is widely used for developing Application software with a graphical user interface (GUI) (here, Qt is classified as a widget toolkit), and also used for developing non-GUI programs such as command-line tools and consoles for servers. Qt allows developers to write applications once and deploy them across … More What is Qt?

Downloading and Compiling LibreCAD from Source (for Linux users)

LibreCAD is an Application for Computer Aided Design (CAD) in two dimension (2D). With LibreCAD you can create technical drawings such as plans for building, interiors, mechanical parts or schematics and diagrams. Note: If we have installed Qt-4 dependencies and the build tool qmake was installed Qt5 and Qt4 both. But when we use $qmake librecad.pro, it uses … More Downloading and Compiling LibreCAD from Source (for Linux users)


 Note:  Must see this post before reading the program’s explaination.  It will clear your doubts. here is its link: https://jasleen7956.wordpress.com/2012/11/12/array-vs-pointer-array/    PROGRAM: #include<stdio.h> char *c[]={“ENTNG”,”NST”,”AMAZI”,”FIRBE”}; char **cp[]={c+3,c+2,c+1,c}; char ***cpp=cp; void main() { printf(“%s”,**++cpp); printf(“%s”,*–*++cpp+3); printf(“%s”,*cpp[-2]+3); printf(“%s”,cpp[-1][-1]+1); } Output of above program is  AMAZINGBEST


An array is a collection of elements of same datatype. Whereas, pointer array is an array of collection of  pointers.   Example of ARRAY: int A[] = {1,2,3,4,5}; here A is a Pointer  Variable . Confused?  😉 Its a Pointer Variable that points to first element of array. A  holds  &A[0]