每个C++/C程序通常分为两个文件。一个文件用于保存程序的声明（declaration），称为头文件。另一个文件用于保存程序的实现（implementation），称为定义（definition）文件。 C++/C程序的头文件以“.h”为后缀，C程序的定义文件以“.c”为后缀，C++程序的定义文件通常以“.cpp”为后缀（也有一些系统以“.cc”或“.cxx”为后缀）-each C / C procedures are usually divided into two documents. A document procedures for the preservation of the statement (declaration), referred to as the first document. Another document preservation procedures for the realization of (implementation), known as the definitions (definition) files. C / C procedures to the first document. " H "suffix, C procedures to document the definition." C "suffix, C procedures definition files normally." Cpp "suffix (and there are a number of systems to." Cc "or." Cxx "suffix )