a == 1 ||2 ||3 语法是不是正确

a == 1 ||2 ||3 语法是不正确的。在C语言中，逻辑运算符||的优先级低于相等运算符==。因此，表达式a == 1 ||2 ||3会先进行相等运算，即a == 1，然后再将结果与2进行逻辑或运算，最后再将结果与3进行逻辑或运算。这样的写法是不符合C语言的语法规范的。正确的写法应该是a == 1 || a == 2 || a == 3。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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