从事软件开发工作的人员也许都会感到,用行式打印机打印出来的源程序印在纸上的区域往往仅占打印纸张的左半部份,右半部份多为空白。倘若能实现一页纸的宽度对半分成双栏方式进行打印,那么同样的源程序打印出来的纸张长度只是相当传统方法打印出来长度的一半或一半多点。这种版面打印出来的源程序阅读起来较为便利,尤其是适合装订,另外纸张的利用率也大为提高。 Personnel engaged in software development may feel that the area printed on a line printer with a line printer tends to occupy only the left half of the print paper and the right half is mostly blank. If the width of a sheet of paper can be half-divided into two columns, the same length of paper printed by the source program is only half or more than half the length of a traditional method. This layout print out the source program is more convenient to read, especially for binding, while the utilization rate of paper is also greatly improved.