HP 71B and HP 75C: Degrees and DMS Conversions
At default, the HP 71B and HP 75C do not have conversions between degrees and degrees-minutes-seconds. Here are two short programs to remedy this and can be used as subroutines. The language used is BASIC.
HP 71B and HP 75C Code: DMS to Degrees. File Name: DMS2D
10 INPUT "d, m, s? ": H, M, S
20 D=SGN(H)*(ABS(H)+M/60+S/3600)
30 PRINT D; "°"
HP 71B and HP 75C Code: Degrees to DMS. File Name: D2DMS
10 INPUT "DEC DEG? "; D
20 G=SGN(D) @ D=ABS(D) @ H=IP(D)
30 M=IP(FP(D)*60)
40 S=FP(FP(D)*60)*60
50 PRINT G*H; "°"; M; "m"; S; "s"
Notes:
1. The degree character, °, can be typed by the following combinations:
HP 71B: g, CTRL, A
HP 75C: CTL + A
2. When entering DMS, separate degrees, minutes, and seconds by commas. For negative degrees in DMS format, enter the negative sign in front of degrees.
3. Repeating decimals (like 42.606666666...) may produce approximate conversions.
Examples to Try
43.25° ←→ 43° 15m 0s
-63.27° ←→ -63° 16m 12s
42.60166667° ←→ 42° 36m 6s (about)
Eddie
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