统计代码行数(包括空行)

统计代码文本文件的例子

代码来自：http://bbs.csdn.net/topics/390358144

错误代码：
#include <iostream>
#include <fstream>
#include <string>

int main()
{
using namespace std;
const char filename[] = "test.cpp";
ifstream fin;
string temp;

fin.open(filename);
if (!fin.is_open())
{
cout << "不能打开文件"<< filename << endl;
exit(EXIT_FAILURE);
}
int count = 0;
getline(fin, temp);
while (fin.good())
{
count++;
getline(fin, temp);
}
fin.close();
cout << "文件" << filename << "共有"
<< count << "行。\n";
return 0;
}

错误原因：getline遇到 eof， good函数返回false.所以没有计数，漏计了一行.

正确做法一:
int main()
{
using namespace std;
const char filename[] = "c:\\1.txt";
ifstream fin;
string temp;

fin.open(filename);
if (!fin.is_open())
{
cout << "不能打开文件"<< filename << endl;
exit(EXIT_FAILURE);
}
int count = 0;

while(fin.peek()!=EOF)
{
count++;
getline(fin, temp);
cout<<temp<<endl;
}
fin.close();
cout << "文件" << filename << "共有"
<< count << "行。\n";
return 0;
}

注意不能用fin.eof ，会造成错误.

正确做法2：

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

int main()
{
using namespace std;
const char filename[] = "test.txt";
ifstream fin;
string temp;

fin.open(filename);
if (!fin.is_open())
{
cout << "不能打开文件"<<filename << endl;
exit(EXIT_FAILURE);
}
int count = 0;

while (getline(fin, temp))
{
count++;
cout<<temp<<endl;
}
fin.close();
cout << "文件" << filename << "共有"
<< count << "行。\n";

getchar();
return 0;
}