输出数据到TXT文档中
#include <iostream>
#include <fstream>
using namespace std;
int main()
{
int a = 10;
float b = 10.0;
ofstream dataFile;
dataFile.open("dataFile.txt", ofstream::app);
// 朝TXT文档中写入数据
dataFile << "dataFile:" << a << "\n"
<< b << endl;
// 关闭文档
dataFile.close();
}
C/C++获取目录下文件或目录
Ubuntu
在Unix/Linux系统中，要获取一个指定目录下所有的文件或文件夹，一般用dirent.h（POSIX标准定义的目录操作头文件）。
- c
#include<stdio.h>
#include<dirent.h>
int main()
{
DIR *dp;
struct dirent *dirp;
char dirname[256];
printf("Please input a directory: ");
scanf("%s",dirname);
if((dp = opendir(dirname)) == NULL)
printf("Can't open %s\n", dirname);
while((dirp = readdir(dp)) != NULL)
printf("%s\n", dirp->d_name);
closedir(dp);
return 0;
}
- c++
#include<iostream>
#include<string>
#include<dirent.h>
using namespace std;
int main()
{
string dirname;
DIR *dp;
struct dirent *dirp;
cout << "Please input a directory: ";
cin >> dirname;
if((dp = opendir(dirname.c_str())) == NULL)
cout << "Can't open " << dirname << endl;
while((dirp = readdir(dp)) != NULL){
//跳过'.'和'..'两个目录
if(dirp->d_name[0] == '.')
continue;
cout << dirp->d_name << endl;
}
closedir(dp);
return 0;
}
Windowns
void getAllFiles(string path, vector<string>& files) {
//文件句柄
long hFile = 0;
//文件信息
struct _finddata_t fileinfo;
string p;
if ((hFile = _findfirst(p.assign(path).append("\\*").c_str(), &fileinfo)) != -1) {
do {
if ((fileinfo.attrib & _A_SUBDIR)) { //比较文件类型是否是文件夹
if (strcmp(fileinfo.name, ".") != 0 && strcmp(fileinfo.name, "..") != 0) {
files.push_back(p.assign(path).append("\\").append(fileinfo.name));
//递归搜索
getAllFiles(p.assign(path).append("\\").append(fileinfo.name), files);
}
}
else {
files.push_back(p.assign(path).append("\\").append(fileinfo.name));
}
} while (_findnext(hFile, &fileinfo) == 0); //寻找下一个，成功返回0，否则-1
_findclose(hFile);
}
}
