Introductory program; just a static picture of a colored triangle.
Shows how to use GLUT.
Has minimal structure: only main() and a display callback.
Uses only the default viewing parameters (in fact, it never mentions viewing at all). This is an orthographic view volume with bounds of -1..1 in all three dimensions.
Draws only using glColor and glVertex within glBegin and glEnd in the display callback.
Uses only the GL_POLYGON drawing mode.
Illustrates glClear and glFlush.
triangle.cpp
// A simple introductory program; its main window contains a static picture
// of a triangle, whose three vertices are red, green and blue. The program
// illustrates viewing with default viewing parameters only.
#ifdef __APPLE_CC__
#include
#else
#include
#endif
// Clears the current window and draws a triangle.
void display() {
// Set every pixel in the frame buffer to the current clear color.
glClear(GL_COLOR_BUFFER_BIT);
// Drawing is done by specifying a sequence of vertices. The way these
// vertices are connected (or not connected) depends on the argument to
// glBegin. GL_POLYGON constructs a filled polygon.
glBegin(GL_POLYGON);
glColor3f(1, 0, 0); glVertex3f(-0.6, -0.75, 0.5);
glColor3f(0, 1, 0); glVertex3f(0.6, -0.75, 0);
glColor3f(0, 0, 1); glVertex3f(0, 0.75, 0);
glEnd();
// Flush drawing command buffer to make drawing happen as soon as possible.
glFlush();
}
// Initializes GLUT, the display mode, and main window; registers callbacks;
// enters the main event loop.
int main(int argc, char** argv) {
// Use a single buffered window in RGB mode (as opposed to a double-buffered
// window or color-index mode).
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
// Position window at (80,80)-(480,380) and give it a title.
glutInitWindowPosition(80, 80);
glutInitWindowSize(400, 300);
glutCreateWindow("A Simple Triangle");
// Tell GLUT that whenever the main window needs to be repainted that it
// should call the function display().
glutDisplayFunc(display);
// Tell GLUT to start reading and processing events. This function
// never returns; the program only exits when the user closes the main
// window or kills the process.
glutMainLoop();
}
Answer:
B) drop-down arrow, Themes
Explanation:
An Excel theme consists of a collection of colors, fonts, and effects that can be applied to a slide to add beauty. Themes make work to be professional, consistent and make adhering to design guidelines easy.
To change theme color, first open a Blank Workbook. Secondly, On the Page Layout tab, in the Themes group, click Themes drop down arrow beside the color button.
Answer:
(a) The algorithm is as follows:
count = 0
for i = 1 to n:
if x = xi:
count++
print(count)
(b) n comparisons
Explanation:
Solving (a):
Assume the integer to locate is x and the elements of the list are: 
Such that: 
The algorithm is as follows:
<em>count = 0</em>
<em>for i = 1 to n:</em>
<em> if x = xi:</em>
<em> count++</em>
<em>print(count)</em>
<em />
The above iterates through the count of the list (i.e. n) and makes comparison with each element of the list (i.e. element 1 to element n).
When a match is found, the count variable is incremented by 1 and printed at the end of the loop
Furthermore:
If there are 3 elements in the list, the algorithm makes 3 comparisons.
It makes 10 comparisons if there are 10 elements in the list.
<em>So: it makes n elements if there are n elements in the list</em>
True, but the only way to get these constant place holders is of you program them in, in other words you have to tell the computer that you want them.
