按字符流方式打开一个.C源程序 （2）依次读入源文件内容，采用进退栈方式判断大括号、中括号以及小括号是否匹配-By way of opening a character stream. C source (2) read the source file followed by the contents of the stack the way to judge the use of advance and retreat braces, brackets and parentheses in