如何判断读取一个空行呢？

[yxjmn827]

觉得很简单，可是还是做不出来，哎，基础不行啊
请高手们给个解答吧？

[lyskyly]

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


int main()
{
ifstream infile("c:\\data.txt");
char str[255];
while(!infile.eof())
{
infile.getline(str,255);
if(strlen(str) == 0)
{
cout<<"empty"<<endl;
}
else
{
cout<<"no empty"<<endl;
}
}
}


data.txt
1 2 3

1 2 3

[Dong]

:(!

[睡在床板下_]

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


int main()
{
ifstream infile("c:\\data.txt");
string temp;
while(!infile.eof())
{
infile.getline(fin,temp);
if(temp == " ")
{
cout<<"empty"<<endl;
}
else
{
cout<<"no empty"<<endl;
}
}
}