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3.0 CONCLUSIONS AND RECOMMENDATIONS <br />The types of errors that can be detected are program exit codes and return codes from <br />? <br />routines. These return codes are typically defined in a "C include file" and consist of <br />sequential integers. <br />Errors are detected by placing tests in higher-level routines/programs (above the <br />? <br />routines/programs where an error could have occurred). Tests compare the return code <br />from a routine/program to a list of know error codes. <br />After an error is detected in a lower-level routine/program, the higher-level <br />? <br />routine/program can take appropriate action, possibly requiring additional input from the <br />user. <br />Error and warning messages can be displayed to the user so that the user understands the <br />? <br />implication of the error. Errors should be documented in the program manual so that the <br />user can verify the error message. <br />4 <br />A275 05.10.94 1.05-13 Malers <br />