C++博客-天狼啸月-文章分类-源码

移动文件、复制文件、新建目录源码

烈焰之光 — Fri, 23 Dec 2011 01:52:00 GMT

#include"iostream"
#include "windows.h"
#include "cstdlib"
using namespace std;
int main()
{
    CreateDirectoryA("D:\\test",0);
    CreateFileA("D:\\new.txt",GENERIC_WRITE,FILE_SHARE_WRITE,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
    CopyFileA("D:\\file.txt","D:\\new.txt",FALSE);
    CreateFileA("D:\\test\\new1.txt",GENERIC_WRITE,FILE_SHARE_WRITE,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
    MoveFile("D:\\file.txt","D:\\test\\new1.txt");
    DeleteFileA("D:\\file.txt");
    return 0;
}

烈焰之光 2011-12-23 09:52 发表评论

文件输入源码

烈焰之光 — Fri, 23 Dec 2011 01:51:00 GMT

#include
#include
#include
#include
using namespace std;
int main()
{
ofstream in;
in.open("a.txt",ios::out);
int i;
char a='a';
char b[10];
for(i=1;i<26;i++)
{
  char *c=itoa(i,b,10);
  if(i<10)
  {
   in<<"0"<   a++;
  }
  else
  {
   in<   a++;
  }
}
in.close();
return 0;
}

烈焰之光 2011-12-23 09:51 发表评论

统计文件行数源码

烈焰之光 — Fri, 23 Dec 2011 01:46:00 GMT

#include
#include
#include
using namespace std;
int CountLines(char *filename)
{
ifstream ReadFile;
int n=0;
char line[512];
string temp;
ReadFile.open(filename,ios::in);
if(ReadFile.fail())
  return 0;
else
{
  while(getline(ReadFile,temp))
   n++;
  return n;
}
ReadFile.close();
}
void main()
{
cout<<"a.txt的行数为："< cin.get();
}

烈焰之光 2011-12-23 09:46 发表评论

读取文件数据到数组源码

烈焰之光 — Fri, 23 Dec 2011 01:45:00 GMT

#include
#include
#include
using namespace std;
int CountLines(char *filename)                              //获取文件行数
{
ifstream ReadFile;
int n=0;
string temp;
ReadFile.open(filename,ios::in);                        //表示以只读方式方式读取文件
if(ReadFile.fail())
  return 0;
else                                                     //文件存在，返回文件行数
{
  while(getline(ReadFile,temp))
  {
   n++;
  }
  return n;
}
ReadFile.close();
}
void main()
{
ifstream file;
int LINES;
char filename[512];
cout<<"请输入要打开的文件名："< cin>>filename;
file.open(filename,ios::in);
if(file.fail())
{
  cout<<"文件不存在"<  file.close();
  cin.get();
}
else                                                         //文件存在
{
  LINES=CountLines(filename);

  int *tc=new int[LINES];
  char *t=new char[LINES];
  int i=0;
  while(!file.eof())                                        //读取数据到数组
  {
   file>>tc[i];
   file>>t[i];
   i++;
   cout<  }
  file.close();
   cout<  for(i=0;i   cout<   cin.get();
   cin.get();
}
}

烈焰之光 2011-12-23 09:45 发表评论

读取文件源码（读取某一行）

烈焰之光 — Fri, 23 Dec 2011 01:43:00 GMT

#include
#include
#include
using namespace std;
int CountLines(char *filename)
{
ifstream ReadFile;
int n=0;
string tmp;
ReadFile.open(filename,ios::in);
if(ReadFile.fail())
{
  return 0;
}
else
{
  while(getline(ReadFile,tmp))
  {
   n++;
  }
  return n;
}
ReadFile.close();
}
string ReadLine(char *filename,int line)
{
int lines,i=0;
string temp;
fstream file;
file.open(filename,ios::in);
lines=CountLines(filename);
if(lines<=0)
{
  return"Error 1:行数错误，不能为零或负数。";
}
if(file.fail())
{
  return"Error 2:文件不存在";
}
if(line>lines)
{
  return "Error 3:行数超出文件长度";
}
while(getline(file,temp)&&i {
  i++;
}
file.close();
return temp;
}
void main()
{
int l;
char filename[256];
cout<<"请输入文件名："< cin>>filename;
cout<<"\n请输入要读取的行数："< cin>>l;
cout< cin.get();
cin.get();
}

烈焰之光 2011-12-23 09:43 发表评论

读出文件放在数组中源码

烈焰之光 — Fri, 23 Dec 2011 01:41:00 GMT

#include
#include
using namespace std;
int main()
{
ifstream infile;
ofstream outfile;
int ch;
int row=1;
int column=1;
infile.open("a.txt");
while((ch=infile.get())!=EOF)
{
  column++;
  if(ch==10)
   row++;
}
column=column=column/2/row;
infile.close();
infile.clear();
infile.open("a.txt");
int **a=new int *[row];
for(int i=0;i  a[i]=new int[column];
int m=0;
int n=0;
while(infile>>a[m][n])
{
  ++n;
  if(n%3==0)
  {
   ++m;
   n=0;
  }
}
infile.close();
outfile.open("c.txt");
for(i=0;i {
  for(int j=0;j   outfile<  outfile< }
for(i=0;i  delete [] a[i];
delete []a;
a=NULL;
return 0;
}

烈焰之光 2011-12-23 09:41 发表评论

读出文件源码（按字节读出）

烈焰之光 — Fri, 23 Dec 2011 01:40:00 GMT

#include
#include
using namespace std;
int main()
{
char buffer[256];
fstream out;
out.open("1.html",ios::in);
cout<<"12.txt的内容如下："< int i=0;
while(!out.eof())
{
  out.getline(buffer,256,'\n');
  cout<  i++;
  if(i==5)
   break;
}
out.close();
}

烈焰之光 2011-12-23 09:40 发表评论

读出文件源码（按行读出）

烈焰之光 — Fri, 23 Dec 2011 01:37:00 GMT

#include<iostream>
#include<fstream>
using namespace std;
int main()
{
    char buffer[256];
    fstream out;
    out.open("1.html",ios::in);
    cout<<"12.txt的内容如下："<<endl;
    int i=0;
    while(!out.eof())
    {
        out.getline(buffer,256,'\n');
        cout<<buffer<<endl;
        i++;
        if(i==5)
            break;
    }
    out.close();
}

烈焰之光 2011-12-23 09:37 发表评论

遍历文件夹源码

烈焰之光 — Fri, 23 Dec 2011 01:34:00 GMT

#include <iostream>
#include <string>
#include <io.h>
#include <stdlib.h>
#include <string.h>
#include <fstream>

using namespace std;

int search_dir(string prefix,int i)
{
    ofstream in;
    in.open("a.txt",ios::out);
    string root = prefix + "*";
    _finddata_t data;

    long handle = _findfirst(root.c_str(), &data);
    if (handle == -1)
    {
        cerr << "error" << endl;
        exit(1);
    }

    if (data.attrib == _A_SUBDIR && strcmp(data.name, ".") && strcmp(data.name, ".."))
    {
        cout << data.name << endl;
        i=search_dir(prefix + data.name + "\\",i);
    }
    else
    {
        cout << data.name << endl;
        in<<data.name<<"\n";
        i++;
    }

    while (_findnext(handle, &data) != -1)
    {
        if (data.attrib == _A_SUBDIR && strcmp(data.name, ".") && strcmp(data.name, ".."))
        {
            cout << data.name << endl;
            i=search_dir(prefix + data.name + "\\",i);
        }
        else
        {
            cout << data.name << endl;
            in<<data.name<<"\n";
            i++;
        }
    }

    _findclose(handle);
    return(i);
}

int main()
{
    int i=0;
    const string root = "D:\\result1\\";
    i=search_dir(root,i);
    cout<<"i="<<i<<endl;
    return 0;
}

烈焰之光 2011-12-23 09:34 发表评论