Source code of 6.1.6 - Oblique shot

10 CLS                 ' Clear the screen
11 CLEAR               ' Delete the contents of all variables
12 DEFINT I-K, P
13 DEFLNG L
15 DEFSNG Q-Z
17 CONST CPI = 3.145933
18 CONST CGr = 9.806645
20 REM Than this number further starts the program code
25 SCREEN 0
30 INPUT "Enter the initial speed of the object:" v
   IF v = 0 OR v > 1500 THEN
     PRINT "Initial speed is not set limits"
     PRINT "Enter a value within the set!"
     SLEEP 5
     CLS : GOTO 30
   END IF
40 INPUT "Enter the value of the angle at which the object is ejected:" q
   IF q <= 0 OR q >= 90 THEN
     CLS
     PRINT "Angles less than 0 and greater than 90 do not make sense."
     PRINT "Enter a value within the set!"
     SLEEP 5
     GOTO 40
   ELSE
     CLS
     PRINT "Initial speed ejections are: " v, "m/s"
     PRINT "Angle value ejections of object is: " q, "degrees"
     Z = (q * CPI) / 180
     Tm = (Z * v * SIN(Z)) / CGr
     MaxY = (v ^ 2 * (SIN(Z)) ^ 2) / (2 * CGr)
     MaxX = (v ^ 2 * (SIN(2 * Z))) / CGr
     PRINT
     PRINT "Maximum height of the object is: " MaxY; "m"
     PRINT "Oblique range shot is: " MaxX; "m"
     PRINT "Time of flight of the object is: " Tm; "sec"
     PRINT
     PRINT "Followed by drawing flight curve"
     SLEEP 5
   END IF
800 GOSUB 1100
900 SLEEP
999 END                ' Completion of the programming code
1000 REM Than this number further start sub-programs
1100 SCREEN 0
1150 CLS
1200 t = 0
1250 coeff = 5500 ' normalization of the size on the screen for largest x & y
1300 REM Back to the drawing
     x = v * t * COS(Z)
     y = v * t * SIN(Z) - (CGr * t ^ 2) / 2
     px = x / coeff
     py = y / coeff
IF py >= 23 OR py < 0 OR px < 0 OR px >= 79 THEN
  GOTO 2000
ELSE
  LOCATE (24 - py), (2 + px), 0: PRINT "*"
END IF
  t = t + 1: GOTO 1300
2000 RETURN

In this example uses a program structure for supervision on award of variables. Missing is the part that would supervise whether the letter is pressed instead of digits. This can be solved by using INKEY$ and control keys marked with numerals. Of course, that adds to the program but is more stable and robust. So for enhanced use always consult RTFM.

Mathematics calculating of oblique shot some effort but not a big problem in this linguistic processor prevents the characters from the display in the graphical display (SCREEN MOD), especially on the newer platforms. Therefore, it is used to display the curve character-mode, and the results had to be processed in a way that can be displayed in a field of 24×80 character with asterisks. What does normalization of results?

In this example, the individual command lines using the logical operators. But it should be borne in mind that the logical structure of type py >= 23 OR py <0 correct and 23 <= py <0 is not.