湖南省长沙市一中卫星远程学校湖南省长沙市一中卫星远程学校 1.2.2 条件语句条件语句练练 习习练练 习习A湖南省长沙市一中卫星远程学校湖南省长沙市一中卫星远程学校知识探究（一）知识探究（一）:条件语句（条件语句（1） 知识探究（一）知识探究（一）:条件语句（条件语句（1） 知识探究（一）知识探究（一）:条件语句（条件语句（1） INPUT xINPUT xIF x0 THENINPUT xIF x0 THENx=-xINPUT xIF x0 THENx=-xEND IFINPUT xIF x0 THENx=-xEND IFPRINT xENDINPUT xIF x=0=0 THEN THEN INPUTINPUT “x=x=”；x xIF IF x x=0=0 THEN THEN PRINT xPRINT xINPUTINPUT “x=x=”；x xIF IF x x=0=0 THEN THEN PRINT xPRINT xELSEELSEINPUTINPUT “x=x=”；x xIF IF x x=0=0 THEN THEN PRINT xPRINT xELSEELSEPRINT -xPRINT -xINPUTINPUT “x=x=”；x xIF IF x x=0=0 THEN THEN PRINT xPRINT xELSEELSEPRINT -xPRINT -xEND IFEND IFENDENDINPUTINPUT “x=x=”；x xIF IF x x=0=0 THEN THEN PRINT xPRINT xELSEELSEPRINT -xPRINT -xEND IFEND IF理论迁移理论迁移理论迁移理论迁移IF dIF d=0 THEN=0 THENIF dIF d=0 THEN=0 THENp= -b/(2*a)p= -b/(2*a)IF dIF d=0 THEN=0 THENp= -b/(2*a)p= -b/(2*a)q=SQR(d)/(2*a)q=SQR(d)/(2*a)IF dIF d=0 THEN=0 THENp= -b/(2*a)p= -b/(2*a)q=SQR(d)/(2*a)q=SQR(d)/(2*a)IF d=0 THENIF d=0 THENIF dIF d=0 THEN=0 THENp= -b/(2*a)p= -b/(2*a)q=SQR(d)/(2*a)q=SQR(d)/(2*a)IF d=0 THENIF d=0 THENPRINT PRINT “x1=x2=x1=x2=”；p pIF dIF d=0 THEN=0 THENp= -b/(2*a)p= -b/(2*a)q=SQR(d)/(2*a)q=SQR(d)/(2*a)IF d=0 THENIF d=0 THENPRINT PRINT “x1=x2=x1=x2=”；p pELSEELSEIF dIF d=0 THEN=0 THENp= -b/(2*a)p= -b/(2*a)q=SQR(d)/(2*a)q=SQR(d)/(2*a)IF d=0 THENIF d=0 THENPRINT PRINT “x1=x2=x1=x2=”；p pELSEELSEPRINT PRINT “x1x1，x2=x2=”；p+qp+q，p-qp-qIF dIF d=0 THEN=0 THENp= -b/(2*a)p= -b/(2*a)q=SQR(d)/(2*a)q=SQR(d)/(2*a)IF d=0 THENIF d=0 THENPRINT PRINT “x1=x2=x1=x2=”；p pELSEELSEPRINT PRINT “x1x1，x2=x2=”；p+qp+q，p-qp-qEND IFEND IFIF dIF d=0 THEN=0 THENp= -b/(2*a)p= -b/(2*a)q=SQR(d)/(2*a)q=SQR(d)/(2*a)IF d=0 THENIF d=0 THENPRINT PRINT “x1=x2=x1=x2=”；p pELSEELSEPRINT PRINT “x1x1，x2=x2=”；p+qp+q，p-qp-qELSEELSEEND IFEND IFIF dIF d=0 THEN=0 THENp= -b/(2*a)p= -b/(2*a)q=SQR(d)/(2*a)q=SQR(d)/(2*a)IF d=0 THENIF d=0 THENPRINT PRINT “x1=x2=x1=x2=”；p pELSEELSEPRINT PRINT “x1x1，x2=x2=”；p+qp+q，p-qp-qELSEELSEPRINT PRINT “No real root.No real root.”END IFEND IFIF dIF d=0 THEN=0 THENp= -b/(2*a)p= -b/(2*a)q=SQR(d)/(2*a)q=SQR(d)/(2*a)IF d=0 THENIF d=0 THENPRINT PRINT “x1=x2=x1=x2=”；p pELSEELSEPRINT PRINT “x1x1，x2=x2=”；p+qp+q，p-qp-qEND IFEND IFELSEELSEPRINT PRINT “No real root.No real root.”END IFEND IFENDENDIF dIF d=0 THEN=0 THENp= -b/(2*a)p= -b/(2*a)q=SQR(d)/(2*a)q=SQR(d)/(2*a)IF d=0 THENIF d=0 THENPRINT PRINT “x1=x2=x1=x2=”；p pELSEELSEPRINT PRINT “x1x1，x2=x2=”；p+qp+q，p-qp-qEND IFEND IFELSEELSEPRINT PRINT “No real root.No real root.”END IFEND IF算法分析算法分析:算法分析算法分析:算法分析算法分析:算法分析算法分析:算法分析算法分析:算法分析算法分析: 开始开始 开始开始输入输入a，b，c 开始开始输入输入a，b，cba? 开始开始输入输入a，b，cba?ca?否否 开始开始输入输入a，b，cba?cb?否否ca?否否 开始开始输入输入a，b，cba?输出输出a，b，c否否cb?否否ca?否否 开始开始输入输入a，b，cba?输出输出a，b，c否否cb?否否ca?否否 结束结束 开始开始输入输入a，b，cba?t=a是是输出输出a，b，c否否cb?否否ca?否否 结束结束 开始开始输入输入a，b，cba?t=aa=b是是输出输出a，b，c否否cb?否否ca?否否 结束结束 开始开始输入输入a，b，cba?t=aa=bb=t是是输出输出a，b，c否否cb?否否ca?否否 结束结束 开始开始输入输入a，b，cba?t=aa=bb=tt=a是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=c是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=t是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=b是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=c是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c c 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THEN 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=a 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=b 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=bb=tb=t 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=bb=tb=tEND IFEND IF 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=bb=tb=tEND IFEND IFIF cIF ca THENa THEN 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=bb=tb=tEND IFEND IFIF cIF ca THENa THENt=at=a 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=bb=tb=tEND IFEND IFIF cIF ca THENa THENt=at=aa=ca=c 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=bb=tb=tEND IFEND IFIF cIF ca THENa THENt=at=aa=ca=cc=tc=t 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=bb=tb=tEND IFEND IFIF cIF ca THENa THENt=at=aa=ca=cc=tc=tEND IFEND IF 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=bb=tb=tEND IFEND IFIF cIF ca THENa THENt=at=aa=ca=cc=tc=tEND IFEND IFIF cIF cb THENb THEN 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=bb=tb=tEND IFEND IFIF cIF ca THENa THENt=at=aa=ca=cc=tc=tEND IFEND IFIF cIF cb THENb THENt=bt=b 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=bb=tb=tEND IFEND IFIF cIF ca THENa THENt=at=aa=ca=cc=tc=tEND IFEND IFIF cIF cb THENb THENt=bt=bb=cb=c 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=bb=tb=tEND IFEND IFIF cIF ca THENa THENt=at=aa=ca=cc=tc=tEND IFEND IFIF cIF cb THENb THENt=bt=bb=cb=cc=tc=t 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=bb=tb=tEND IFEND IFIF cIF ca THENa THENt=at=aa=ca=cc=tc=tEND IFEND IFIF cIF cb THENb THENt=bt=bb=cb=cc=tc=tEND IFEND IF 开始开始输入输入a，b，cba?t=aa=bb=tt=aa=cc=tt=bb=cc=t是是是是是是输出输出a，b，c否否cb?否否ca?否否 结束结束INPUT aINPUT a，b b，c cIF bIF ba THENa THENt=at=aa=ba=bb=tb=tEND IFEND IFIF cIF ca THENa THENt=at=aa=ca=cc=tc=tEND IFEND IFIF cIF cb THENb THENt=bt=bb=cb=cc=tc=tEND IFEND IFPRINT aPRINT a，b b，c cENDEND小结作业小结作业小结作业小结作业小结作业小结作业小结作业小结作业作业作业:习案习案6