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Download Mastering COBOL Programming by R. Hutty (auth.) PDF

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By R. Hutty (auth.)

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ACCEP·r YEARS. * * COMPUTE AMOUNT-AT-END ROUNDED = AMOUNT * (1 + RATE-OF-INTEREST / 100) ** YEARS. DISPLAY "FINAL AMOUNT " AMOUNT-AT-END. s·roP RUN. 2 when zero suppression is applied. Zero suppression is specified by replacing the leading 9s in a picture by Zs. 9. 4 and when output would appear with two spaces before the 7. OO. Leading zeros can also be replaced by *s, when the asterisk is referred to as the 'cheque protect' character. **. 45. A numeric data-item can also be specified to be all blanks if its value is zero by adding BLANK WHEN ZERO after the picture.

99 then a SIZE ERROR has occurred. Although a SIZE ERROR condition can normally be avoided in simple cases, it must be checked if it is likely to happen, otherwise the program will continue with an undefined (and certainly incorrect) value in the resulting data-item. A check can be made by including the ON SIZE ERROR phrase at the end of any arithmetic statement. For example, the statement ADD N1 N2 N3 GIVING RESULT ON SIZE ERROR PERFORM ADD-ERROR. will cause the paragraph ADD-ERROR to be performed if a SIZE ERROR occurs during execution of the ADD statement.

Such constants are called figurative constants and can be used in place of literals. The two most commonly used figurative constants are (i) ZERO, which can be used in place of the numeric literal 0 (ii) SPACE or SPACES, which can be used in place of the non-numeric literal " " or the space literal of any number of spaces. 5 THE DISPLAY STATEMENTS We are now in a position to specify the DISPLAY statement more fully, and write DISPLAY statements which output more than one piece of information on the same line of the display.

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