如果C++程序要调用已经被编译后的C函数，该怎么办？

如何理解extern "C"

如何实现C调用C++接口库

对由 __cplusplus 和 extern "C" 组成的 C、C++编译器编译标准C函数的通用写法的理解-If you want to call C++ program has been compiled C functions, how to do? How to understand the extern " C"　How C call C++ interface library and on the __cplusplus extern " C"　consisting of C, C++ compiler to compile the standard C function, a common understanding of written