表示整数、字符和布尔值的算术类型合称为整型。

The arithmetic types that represent integers, characters, and Boolean values are collectively referred to as the integral types.

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否则，如果有符号整型可以表示无符号整型的值时，公共类型是有符号类型。

Otherwise, if the signed integer type can represent all of the values of the unsigned type, the common type is the signed type.

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否则，如果有符号整型可以表示无符号整型的值时，公共类型是有符号类型。

Otherwise, if the signed integer type can represent all of the values of the unsigned type, the common type is the signed type.

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