Module 6 Arithmetic. Arithmetic Verb Template  Most COBOL arithmetic verbs conform to the template above. For example; ADD Takings TO CashTotal. ADD.

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Presentation transcript:

Module 6 Arithmetic

Arithmetic Verb Template  Most COBOL arithmetic verbs conform to the template above. For example; ADD Takings TO CashTotal. ADD Males TO Females GIVING TotalStudents. SUBTRACT Tax FROM GrossPay. SUBTRACT Tax FROM GrossPay GIVING NetPay. DIVIDE Total BY Members GIVING MemberAverage. DIVIDE Members INTO Total GIVING MemberAverage. MULTIPLY 10 BY Magnitude. MULTIPLY Members BY Subs GIVING TotalSubs.  The exceptions are the COMPUTE and the DIVIDE with REMAINDER.

The ROUNDED option Receiving FieldActual ResultTruncated ResultRounded Result PIC 9(3)V PIC 9(3)  The ROUNDED option takes effect when, after decimal point alignment, the result calculated must be truncated on the right hand side.  The option adds 1 to the receiving item when the leftmost truncated digit has an absolute value of 5 or greater.

 A size error condition exists when, after decimal point alignment, the result is truncated on either the left or the right hand side.  If an arithmetic statement has a rounded phrase then a size error only occurs if there is truncation on the left hand side (most significant digits). Receiving FieldActual ResultSIZE ERROR PIC 9(3)V PIC 9(3)V PIC 9(3).124 PIC 9(3).1246 PIC 9(3)V9 Not Rounded PIC 9(3)V9 Rounded PIC 9(3)V9 Rounded The ON SIZE ERROR option YesYesNoYesYesNoYes

ADD Examples ADD Cash TO Total. Before Before After ADD Cash, 20 TO Total, Wage. Before Before After ADD Cash, Total GIVING Result. Before Before After ADD Males TO Females GIVING TotalStudents. Before Before After ADD Cash TO Total. Before Before After ADD Cash, 20 TO Total, Wage. Before Before After ADD Cash, Total GIVING Result. Before Before After ADD Males TO Females GIVING TotalStudents. Before Before After

SUBTRACT Examples SUBTRACT Tax FROM GrossPay, Total. Before Before After SUBTRACT Tax, 80 FROM Total. Before Before After SUBTRACT Tax FROM GrossPay GIVING NetPay. Before Before After SUBTRACT Tax FROM GrossPay, Total. Before Before After SUBTRACT Tax, 80 FROM Total. Before Before After SUBTRACT Tax FROM GrossPay GIVING NetPay. Before Before After

MULTIPLY and DIVIDE Examples MULTIPLY Subs BY Members GIVING TotalSubs ON SIZE ERROR DISPLAY "TotalSubs too small" END-MULTIPLY. Subs Members TotalSubs Subs Members TotalSubs Before Before After MULTIPLY 10 BY Magnitude, Size. Before Before After DIVIDE Total BY Members GIVING Average ROUNDED. Before Before After MULTIPLY Subs BY Members GIVING TotalSubs ON SIZE ERROR DISPLAY "TotalSubs too small" END-MULTIPLY. Subs Members TotalSubs Subs Members TotalSubs Before Before After MULTIPLY 10 BY Magnitude, Size. Before Before After DIVIDE Total BY Members GIVING Average ROUNDED. Before Before After

The Divide Exception DIVIDE 201 BY 10 GIVING Quotient REMAINDER Remain. Before Before After DIVIDE 201 BY 10 GIVING Quotient REMAINDER Remain. Before Before After

Compute IrishPrice = SterlingPrice / Rate * 100. Before Before After Compute IrishPrice = SterlingPrice / Rate * 100. Before Before After The COMPUTE Precedence Rules. Precedence Rules. 1.** 1.**=POWERN N 2.* / 2.*= MULTIPLYx /=DIVIDE÷ =ADD+ -=SUBTRACT- Precedence Rules. Precedence Rules. 1.** 1.**=POWERN N 2.* / 2.*= MULTIPLYx /=DIVIDE÷ =ADD+ -=SUBTRACT-