在屏幕上显示0360度的cos(x)曲线与直线f(x)=45*(y-1)+31的迭加图形。其中cos(x)图形用“*”表示，f(x)用“+”表示，在两个图形相交的点上则用f(x)图形的符号。 图形迭加的关键是要在分别计算出同一行中两个图形的列方向点坐标后，正确判断相互的位置关系。-Displayed on the screen of 0 to 360 degrees cos (x) curve and the straight line f (x) = 45* (y-1)+31 superposition graphics. Where cos (x) graphics with "*" indicates, f (x) with a "+" means, in the point of intersection of the two graphs with f (x) graphical symbols. The key to the graphics superimposed upon each coordinate point is calculated in the same row in the column direction in the two graphs, correctly determine the mutual positional relationship.