问题
while(true) {
getline(myfile, a[i]);
if (a[i]=="")//or if(a[i].empty())
break;
i++;
n = i;
}
In this while loop, when getline function gets a blank line from myfile object (there is a blank line between a series of binary numbers).
Example:
101010
000
11
1
00
<- when getline meets this line, by "if" break; has to work.
0011
10
00111
1101
But, it doesn't realize that blank line.
What is wrong?
What should I code to break when getline() meets the blank line?
I do this through PuTTY.
回答1:
You are most likely running into the NL/CR issue.
Instead of
if (a[i]=="")
Use something like:
if (isEmptyLine(a[i]))
where
bool isEmptyLine(std::string const& s)
{
for ( auto c : s )
{
if ( !std::isspace(c) )
return false;
}
return true;
}
You can also convert the file into a file with UNIX style line endings by using a utility called dos2unix. That should also fix the problem.
来源：https://stackoverflow.com/questions/36157584/my-codes-work-well-in-dev-c-ide-but-in-linux-terminal-it-doesnt-especiall