1323. Switch text

本文介绍了一个程序设计任务:创建一个程序来反转输入文件中的每一行文本,并将其从中间拆分为两部分进行输出。该程序能够处理成对的输入行,忽略空白行且不输出它们。

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1323. Switch text



Description


The program must switch the text lines in a backward order and split them by the middle, processing the input lines in pairs. If an empty or blank line is found, it is considered as a line but it is not printed out to the output.


Input


The input will be a text file with text lines.


Output


Standard output with the switched and splitted lines.


Sample Input


This lines must be printed backwards and splitted in the middle.
And each line too!
hellow my friend
how are you today
i hope you're fine


be cool, be nice.


Sample Output


 hcae dnA!oot enil
wkcab detnirp eb tsum senil sihT.elddim eht ni dettilps dna sdra
y era wohyadot uo
m wollehdneirf y
oy epoh ienif er'u
 ,looc eb.ecin eb


注意空格回车的判断。

#include <iostream>
#include <algorithm>
#include <string>
using namespace std;

bool checkEmptyLine(string str)
{
	for (int i = 0; i < str.size(); i++)
	{
		if (str[i] != ' ')
			return true;
	}
	return false;
}

void calculate(string str)
{
	string result,final,p1,p2;
	int len=str.length();
	if(checkEmptyLine(str))
	{
		result=str;
		for(int i=0;i<len;i++)
			result[i]=str[len-1-i];
		p1=result.substr(0,len/2);
		if(len%2==0)
			p2=result.substr(len/2,len/2);
		else p2=result.substr(len/2,len/2+1);
		final=p2+p1;
		cout<<final<<endl;
	}
}

int main()
{
	string str,str2;
	while(getline(cin,str))
	{
		getline(cin,str2);
		calculate(str2);
		calculate(str);
	}
	return 0;
}


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