文件名称:Pongo-light-the-lamp
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在基于Internet的程序中，我们常常需要判断一个IP字符串的合法性。
合法的IP是这样的形式：
A.B.C.D
其中A、B、C、D均为位于[0, 255]中的整数。为了简单起见，我们规定这四个整数中不会有前导零存在，如001这种情况。
现在，请你来完成这个判断程序吧^_^
Input
输入由多行组成，每行是一个字符串，输入由“End of file”结束。
字符串长度最大为30，且不含空格和不可见字符。
Output
对于每一个输入，单独输出一行
如果该字符串是合法的IP，输出YES，否则，输出NO
-In an internet-based program, we often need to determine the legality of an IP string.
Legitimate IP is the form:
A.B.C.D
A, B, C, and D are all integers in [0, 255]. For the sake of simplicity, we specify that no leading zero exists in these four integers, as in 001.
Now, please to complete the judgment procedure ^_^
The Input
The input consists of several lines, each of which is a string, and the input is terminated by the End of file .
The length of the string is up to 30, with no Spaces and no visible characters.
The Output
For each input, a single output row
If the string is legal IP, output YES, otherwise, the output NO
合法的IP是这样的形式：
A.B.C.D
其中A、B、C、D均为位于[0, 255]中的整数。为了简单起见，我们规定这四个整数中不会有前导零存在，如001这种情况。
现在，请你来完成这个判断程序吧^_^
Input
输入由多行组成，每行是一个字符串，输入由“End of file”结束。
字符串长度最大为30，且不含空格和不可见字符。
Output
对于每一个输入，单独输出一行
如果该字符串是合法的IP，输出YES，否则，输出NO
-In an internet-based program, we often need to determine the legality of an IP string.
Legitimate IP is the form:
A.B.C.D
A, B, C, and D are all integers in [0, 255]. For the sake of simplicity, we specify that no leading zero exists in these four integers, as in 001.
Now, please to complete the judgment procedure ^_^
The Input
The input consists of several lines, each of which is a string, and the input is terminated by the End of file .
The length of the string is up to 30, with no Spaces and no visible characters.
The Output
For each input, a single output row
If the string is legal IP, output YES, otherwise, the output NO
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下载文件列表
Pongo light the lamp\Makefile.win
....................\main.c
....................\main.o
....................\reading practicing.dev
....................\reading practicing.exe
....................\reading practicing.layout
Pongo light the lamp