April 11, 2014
Programs that create graphs and charts are an important tool in many commercial and technical endeavors; for instance, a programmer might look at a graph of memory usage during a debugging run of his program to identify hot spots that need to be trimmed.
A simple type of graph is a scatter graph, sometimes called an x/y plot. The input is a list of points on an x,y-grid; the output is a picture with the points plotted on a grid. A simple input file appears on the next page.
Your task is to write a program to plot scatter graphs. When you are finished, you are welcome to read or run a suggested solution, or to post your own program or discuss the exercise in the comments below.