摘要： The#pragma packdirective modifies the current alignment rule for members of structures following the directive.The#pragma packdirective modifies the current alignment rule for only the members of structures whose declarations follow the directive.It does not affect the alignment of the structure dir 阅读全文

摘要： #pragmadirective :Specifies implementation-defined instructions to the compiler.C90 does not permit a#pragmadirective to be produced as the result of a macro expansion. However, the C99_Pragmaoperator enables you to embed a preprocessor macro in a pragma directive, and_Pragmais permitted in C90 if-- 阅读全文