第一章 算法初步,A3 B5 AB BA PRINT“A”;A PRINT“B”;B END,INPUT x1,y1,x2,y2 x(x1x2)/2 y(y1y2)/2 PRINT “点M的横坐标为”;x PRINT “纵坐标为”;y END,INPUT“jia”;a INPUT“yi”;b INPUT“bing”;c PRINT“The average”;(abc)/3 END,INPUT“x,y”;x,y xx/2 y3*y,PRINT x,y xxy yy1 PRINT x,y END,INPUT “x,y”;x,y xx/3 y2*y2 PRINT x,y x2*xy yy1 PRINT x,y END,