程序运行后，可以任意次任意选择1－５各种功能（第一次当然应选0），直至选择6结束程序运行。



考虑实现功能5的函数原型作下列几种变化时，该函数及程序的其它部分需要作什么相应的变化，说明变化的原因。

node* del5560(node*)

void del5560(node*&)

void del5560() //头指针使用全局变量-running, they can choose any arbitrary time 1-5 various functions (the first course to be elected 0), until the end of June to choose running. 5 to consider ways to achieve functional prototype for the following types of changes, the functions and procedures of other parts of the need to make corresponding changes in what that change.* Del5560 node (node*) void del5560 (node*) void del5560 ()// use of the first indicators of global variables