Description: 1. To establish a string file, keyboard input from a number of line strings, they are output to disk file saved .2. From the disk file on the read-back the string, and displayed on the screen .3. From the disk file in the search string to determine the existence of the document by the search string, and on the screen showing search results 4. search to replace the existence of the string in the document and save changes the results of .5. in search of string and then add a word string.
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