03-12-2021, 05:14 AM
Since the poor HP-10C never have a Solutions Handbook like HP-11C or
ohters like HP's Applications Book.
I'm imprementing a bit from HP-25 Applications Book on page 49
Title "Calendar, Day of the Week, Days betweenn Two Dates"
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Steps:
1. Compute N(m,d,y)
[f] [PRGM]
Month [STO] 1
Day [STO] 2
Year [STO] 3
[R/S] Display N
2. Compute Day of the week (0 = Sunday) [R/S]
3. For number of days store first N from Step 1 and [STO] 7
4. Repeat steps 1 then [RCL] 7 [-] display number of days
-----------------------------------------
Program:
Example:
What day of the week is March 31, 2021 and
How many days to December 1, 2021
[f] [PRGM]
3 [STO] 1
31 [STO] 2
2021 [STO] 3
[R/S] display 117274 [ST0] 7 [R/S] 3 // Wednesday
Remark: If no need to find number of days don't have to do [STO] 7
Number of days:
12 [STO] 1
1 [STO] 2
Remark: If same year no need to store again to [STO] 3
[R/S] display 117519
[RCL] 7 [-] display 245 // answer 245 days
To check answer using the HP-12C
M.DY mode
3.312021 [ENTER] 0 [DATE] display 3,31,2021 "3"
Previous result on display enter 12.012021 [△DYS] display "245"
Gamo 3/2021
ohters like HP's Applications Book.
I'm imprementing a bit from HP-25 Applications Book on page 49
Title "Calendar, Day of the Week, Days betweenn Two Dates"
----------------------------------------
Steps:
1. Compute N(m,d,y)
[f] [PRGM]
Month [STO] 1
Day [STO] 2
Year [STO] 3
[R/S] Display N
2. Compute Day of the week (0 = Sunday) [R/S]
3. For number of days store first N from Step 1 and [STO] 7
4. Repeat steps 1 then [RCL] 7 [-] display number of days
-----------------------------------------
Program:
Code:
01 3
02 RCL 1
03 X≤Y
04 GTO 09
05 1
06 +
07 RCL 3
08 GTO 15
09 1
10 3
11 +
12 RCL 3
13 1
14 -
15 3
16 6
17 5
18 . // decimal point
19 2
20 5
21 x
22 INT
23 X<>Y
24 3
25 0
26 . // decimal point
27 6
28 x
29 INT
30 +
31 RCL 2
32 +
33 6
34 2
35 1
36 0
37 4
38 9
39 -
40 R/S
41 7
42 ÷
43 FRAC
44 7
45 x
46 GTO 00
Example:
What day of the week is March 31, 2021 and
How many days to December 1, 2021
[f] [PRGM]
3 [STO] 1
31 [STO] 2
2021 [STO] 3
[R/S] display 117274 [ST0] 7 [R/S] 3 // Wednesday
Remark: If no need to find number of days don't have to do [STO] 7
Number of days:
12 [STO] 1
1 [STO] 2
Remark: If same year no need to store again to [STO] 3
[R/S] display 117519
[RCL] 7 [-] display 245 // answer 245 days
To check answer using the HP-12C
M.DY mode
3.312021 [ENTER] 0 [DATE] display 3,31,2021 "3"
Previous result on display enter 12.012021 [△DYS] display "245"
Gamo 3/2021