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FM Towns: Free Software Collection 7
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2houtei.bas
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BASIC Source File
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1993-11-30
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390b
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18 lines
10 CLS
20 PRINT "二次方程式の計算"
30 PRINT "aX2+bX+c=0"
40 INPUT "a=",A
50 INPUT "b=",B
60 INPUT "c=",C
70 PRINT A"X2+"B"X+"C"=0"
80 D=B*B-4*A*C
90 IF D=0 THEN 150
100 IF D<0 THEN 170
110 X1=(-B+SQR(D))/(2*A)
120 X2=(-B-SQR(D))/(2*A)
130 PRINT "X="X1","X2
140 A$=INKEY$:IF A$="" THEN 140 ELSE 10
150 X1=-B/(2*A)
160 PRINT "X="X1 : GOTO 140
170 PRINT "解は無し" : GOTO 140