... facilityallows the user to select the required file for reading or saving using the mouse.Files in a folder can be listed using a modal window. A modal window is a pop-upwindows that does not ... Therefore, their input strings, input[2].itemand input[3].item, respectively, are converted to double using the C++ function,atof(). Other inputs, input[1].item, input[6].item, and input[7].item, areglobal ... augmentedmatrix has zero contents in all its (their) elements. The theorem is best illustrated using two examples, one with an infinite number of solutions and another with nosolution.Example...