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78IV Datasheet(PDF) 104 Page - NEC

Part # 78IV
Description  CC78K4 Ver.2.30 or Later, C Compiler Language
PDF  523 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
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78IV Datasheet(HTML) 104 Page - NEC

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CHAPTER 5 OPERATORS AND EXPRESSIONS
User’s Manual U15556EJ1V0UM
104
5.12 Comma Operator
(1) Comma operator
Comma Operator
,
FUNCTION
The comma operator evaluates the left operand as a void type (that is, ignores its value) and then evaluates the
right operand. The type and value of the result of the comma expression are the type and value of the right
operand.
In contents where a comma has another meaning (as in a list of function arguments or in a list of variable
initializations), comma expressions must be enclosed in parentheses.
In other words, the comma operator
described in this chapter will not appear in such a list.
In the following example, the comma operator finds the value of the second argument of the function “f ( )”. The
value of the second argument becomes 5.
int a, c, t;
void main(void)
f(a, (t=3, t+2), c);
}
SYNTAX
E1 , E2



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