傅立叶级数在数字信号处理中有非常重要的应用，这里提供了傅立叶级数在C环境下的源码及其应用，对于数据处理的工程人员大有裨益。-Fourier series in the digital signal processing is a very important application, it provides Fourier Series C environment in the source and application of data processing for the engineeri