C/C++ Users Group Library 1996 July

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E Unicorn Library Documentation 3.1 page 47 __________________________________________________________________ ellipser F Plots an ellipse on the graphics screen. The ellipse may be rotated in 6 degree increments from 0 to 90 degrees. To obtain full 360 degree rotation the major axis may be defined as either x or y with rotation. Call: ellipser(xc, yc, rotate, r1, r2, color); xc = column coordinate of center yc = row coordinate of center rotate = angle of rotation (0, 6, 12, 18 etc.) r1 = half the distance along the x-axis (columns) r2 = half the distance along the y axis (rows) color = color of the ellipse Example: main() { sm(4); /* set graphics mode */ /* draw an ellipse in color 2 rotated 48 degrees */ ellipser(100,100,48, 50, 80, 2); } Unicorn 1 Documentation 3.1 page 48 __________________________________________________________________________ equip Returns an integer idicative of the equipment contained on the PC. The number may be interpreted as follows: bit 0 - diskette installed bit 1 - not used bit 2, 3 - always 11 bit 4, 5 - initial video mode 01 = 40 x 25 BW 10 = 80 x 25 BW bit 6, 7 - number of diskette drives ( only if bit 0 = 1) 00 = 1 01 = 2 bit 8 - 0 = dma present 1 = no dma on system bit 9, 10, 11 - number of RS-232 cards installed bit 12 - game I/O attached bit 13 - not used bit 14, 15 - number of printers Call: equip(); Example: main() { equip(); /* get current equipment status */ } E Unicorn Library Documentation 3.1 page 49 ___________________________________________________________________ factrl F Returns the factorial of an integer as a double. Call: factrl(8); Example: main() { double a; a = factrl(21); } E Unicorn Library Documentation 3.1 page 50 __________________________________________________________________ fibon F Returns the integer sum of all the integers up to and including the passed parameter. Call: fibon(number); number = ending point of adding numbers Example: main() { int a; a = fibon(5); } E Unicorn Library Documentation 3.1 page 51 __________________________________________________________________ forward F Moves the turtle (turtle graphics) in its current direction by a specified distance. The distance is measured in pixels. Call: forward(pixels); pixels = number of pixels to move in current direction Example: main() { sm(4); /* set graphics mode */ pendown(); /* set pen down on screen to draw */ forward(50); /* move forward 50 pixels */ } E Unicorn Library Documentation 3.1 page 52 __________________________________________________________________ fpower F Returns fractional powers of doubles. It works only with positive numbers although the power may be negative. Call: fpower(number, pow); number = double value to raise to a power pow = double power Example: main() { fpower(5.67, 2.43); Unicorn 1 Documentation 3.1 page 53 __________________________________________________________________________ getchne Get a character from the standard input with no echo. Call: getchne(); Example: main() { int a; a = getchne(); /* return a character in a with no echo */ } Unicorn 1 Documentation 3.1 page 54 __________________________________________________________________________ getctype Returns an integer indicating the type of IBM-PC. return: FFh = Original IBM-PC FEh = PC XT, portable PC or PC with revised system board FDh = PCjr FCh = PC-AT Call: getctype(); Example: main() { int a; a = getctype(); /* find what type of machine it is */ if (a==255) printf("This is an original IBM-PC"); } E Unicorn Library Documentation 3.1 page 55 __________________________________________________________________ getcurp F This returns the current position of the cursor on the screen in row, column format. Call: getcurp(&row, &column); row = the current cursor row position column = the current cursor column position Example: main() { getcurp(row, column); } Unicorn 1 Documentation 3.1 page 56 __________________________________________________________________________ gliss Produces a sliding sound or glissando using the IBM mode of sound production. Call: gliss(beg, end, rate); beg = starting frequency end = ending frequency rate = rate of increase/decrease. a larger rate slows it down Example: main() { gliss(300, 2000, 1); /* rapid slide from 300 to 2000 cycles*/ gliss(2000, 300, 10); /* slower slide down from 2000 to 300 cycles */ } E Unicorn Library Documentation 3.1 page 57 __________________________________________________________________ gothic F Displays Gothic characters on the graphics screen. All characters are displayed in a 16 pixel wide by 20 pixel high matrix. Call: gothic(char, ulc, ulr, color); char = character to print ulc = upper left corner column ulr = upper left corner row color = color of the character Example: main() { sm(4); /* set graphics mode */ /* print a gothic W at 20, 30 in color 3 */ gothic('W', 20, 30, 3); } E Unicorn Library Documentation 3.1 page 58 ___________________________________________________________________ hollow F This function prints outline characters on the graphics screen. The characters are defined in a 16 column by 30 row pixel matrix. Call: hollow(char, ulc, ulr, color); char = character to print ulc