RosettaCodeData/Task/Modular-inverse/Chipmunk-Basic/modular-inverse.basic

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10 CLS
20 CALL modularinverse(42, 2017)
30 CALL modularinverse(40, 1)
40 END
50 SUB modularinverse(e,t)
60 d = 0
70 IF e < t THEN
80 b = e
90 c = 1
100 WHILE b > 1
110 s = INT(((t-b)/e)+1)
120 b = b+s*e
130 c = c+s
140 b = b-t
150 WEND
160 d = c
170 ENDIF
180 m = d
190 PRINT m
200 END SUB