Although ival is declared extern, it has an initializer, which means this statement is a definition.

虽然ival声明为extern，但是它有初始化式，代表这条语句是一个定义。

youdao

Although ival is declared extern, it has an initializer, which means this statement is a definition.

虽然ival声明为extern，但是它有初始化式，代表这条语句是一个定义。

youdao