RosettaCodeData/Task/Formatted-numeric-output/Applesoft-BASIC/formatted-numeric-output.basic

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0 P = 5:T = 3:R = 7.125: GOSUB 100"FORMATTED NUMERIC OUTPUT
9 END
REM FORMATTED NUMERIC OUTPUT
REM Given R a Real number
REM and P as left Padding amount, P$ as the Padding
REM and T as the Trailing amount, T$ as the Trailing padding
100 R$ = STR$ (R):L = LEN (R$):S$ = "": IF MID$ (R$,1,1) = " " THEN S$ = " ":L = L - 1:R$ = RIGHT$ (R$,L)
110 IF MID$ (R$,1,1) = "-" THEN L = L - 1:R$ = RIGHT$ (R$,L):S$ = S$ + "-": REM SIGN
120 LET D$ = "":D = 0:E$ = "":E = 0: REM DECIMAL, EXPONENT and POSITIONS
130 IF P$ = "" THEN P$ = "0": REM LEFT PADDING
140 IF T$ = "" THEN T$ = "0": REM TRAILING PADDING
150 FOR I = 1 TO L
160 LET C$ = MID$ (R$,I,1)
170 IF C$ = "." THEN D = I
180 IF C$ = "E" THEN E = I
190 NEXT I
200 IF E THEN E$ = MID$ (R$,E):R$ = LEFT$ (R$,E - 1)
210 IF D THEN D$ = MID$ (R$,D + 1):R$ = LEFT$ (R$,D - 1)
220 LET PAD$ = "": FOR I = 1 TO P:PAD$ = P$ + PAD$: NEXT
230 PRINT S$ RIGHT$ (PAD$ + R$,P);
240 LET PAD$ = "": FOR I = 1 TO T:PAD$ = PAD$ + T$: NEXT
250 IF T THEN PRINT "." LEFT$ (D$ + PAD$,T);
260 PRINT E$;
270 RETURN