里面包含了五个c语言程序源代码，长途电话计费程序，用来计算长途电话费用问题。插入排序，将无序的数字排好序。比较大小的代码程序。-Which contains five c language source code, long distance telephone billing program used to calculate the long-distance telephone costs. Insertion sort, the number of unordered sorted. C