批量处理文件

#include <iostream>
#include <fstream>
#include <cstdlib>

using std::cout;
using std::endl;
using std::fstream;
using std::string;

int main(int argc, char **argv)
{
    //创建文件名列表文件，若存在则清空文件
    fstream file_list("file_list.txt",std::ios::out);
    file_list.close();

    //写入文件名列表到file_list.txt
    system("dir /a /b >> file_list.txt");
    
    long sum_code = 0;
    fstream code_file;
    file_list.open("file_list.txt", std::ios::in);
    string str_line = "";
    string t_str = "";
    unsigned int loc = 0;//查找文件名中的"."
    string str_last = "";
    
    while (!file_list.eof())
    {
        getline(file_list,str_line);
        loc = str_line.find(".",0);//从0开始查找"."出现的位置
//        cout << "loc = " << loc << endl;
        if (loc != string::npos)
        {
            str_last = str_line.substr(loc);
//            cout << "str_last = " << str_last << endl;
        }
        else
        {
            continue;
        }
        
        if (str_last.compare(".h") == 0
        || str_last.compare(".c") == 0
        || str_last.compare(".cpp") == 0)
        {
            code_file.open(str_line.c_str(),std::ios::in);
            cout << "文件名 : " << str_line << endl;
        }
        else
        {
            continue;
        }
        
        //读文件行数
        while (!code_file.eof())
        {
            getline(code_file,t_str);
            cout << t_str << endl;
            sum_code++;
        }
        code_file.close();
        cout << endl;
    }
    file_list.close();
    
    cout << "代码行数：" << sum_code << endl;
    system("pause");

    return 0;
}