Is the order of evaluation of operands in C and C expressions specified or unspecified?

Order of Evaluation of Operands in C and C

Question:

In expressions like "a b", is the order of evaluation of the operands specified or unspecified?

Answer:

The order of evaluation of operands is unspecified in both C and C .

Details:

• In C :

  • For user-defined types, "a b" is a function call, and the standard states that the order of evaluation of function arguments is unspecified.
  • For normal operators, the standard specifies that the order of evaluation of operands is also unspecified.

• In C (assumption):

  • The wording of the standard is similar to that of C , so it is likely that the order of evaluation of operands is unspecified in C as well.

Additional Information:

It's important to note that even though the order of evaluation is unspecified, it is guaranteed that the result of the expression will be the same regardless of the evaluation order. This is because the compiler is responsible for ensuring that the expression is evaluated correctly.

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