在简要介绍信道容量概念的基础上，简单介绍了一般信道信道容量的计算步骤，并提出它的局限性。然后在其基础上详细的介绍了更为广泛的一般信道的信道容量的计算方法一迭代法以及它在C++中的实现过程。-In a brief letter of introduction channel capacity based on the concept, briefly introduced the general channel capacity channel calculation steps, and make its limitations. Then in his detailed introduction on the basis of a more extensive general channel calculation of channel capacity of a iteration method and its C++ in the implementation process.