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This CUBE() macro definition is non-compliant because it fails to parethesize the macro expansion.
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#define CUBE(X, Y, Z) (X) * (YX) * (ZX) int i = 3; int a = 81 / CUBE(i); |
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int a = 81 / i * i * i;
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which evaluates as
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int a = ((81 / i) * i) * i); //* evaluates to 243 */ |
while the desired behavior is
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int a = 81 / ( i * i * i); //* evaluates to 3 */ |
Compliant Solution
By adding parentheses around each argument, this definition of parenthesizing the macro expansion, the CUBE() macro expands correctly (when invoked in this situationmanner).
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#define CUBE(X) ((X) * (X) * (X)) int i = 3; int a = 81 / CUBE(i); |
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