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• Between the evaluations of the function designator and actual arguments in a function call and the actual call
• Between the evaluations of the first and second operands of the following operators:
  • Logical AND: &&
  • Logical OR: ||
  • Comma: ,
• Between the evaluations of the first operand of the conditional ?: operator and whichever of the second and third operands is evaluated
• The end of a full declarator
• Between the evaluation of a full expression and the next full expression to be evaluated; the following are full expressions:
  • An initializer that is not part of a compound literal
  • The expression in an expression statement
  • The controlling expression of a selection statement (if or switch)
  • The controlling expression of a while or do statement
  • Each of the (optional) expressions of a for statement
  • The (optional) expression in a return statement
• Immediately before a library function returns
• After the actions associated with each formatted input/output function conversion specifier
• Immediately before and immediately after each call to a comparison function, and also between any call to a comparison function and any movement of the objects passed as arguments to that call

Furthermore, Section 6.5.16, paragraph 3 says (regarding assignment operations):

The side effect of updating the stored value of the left operand is sequenced after the value computations of the left and right operands.

This rule means that statements such as

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