仅供参考:
#include <algorithm>
#include <iostream>
#include <functional>
#include <cstring>
using namespace std;
int main() {
char *Alphabet = "abcdefghijklmnopqrstuvwxyz" ;
char *Vowels = "aeiou" ;
char *AlphaNum = "0123456789abcdef" ;
char result[45] ;
char *last ;
int lenA = strlen(Alphabet) ;
int lenV = strlen(Vowels ) ;
int lenAN = strlen(AlphaNum) ;
cout << "Alphabet = " << Alphabet << endl ;
cout << "Vowels = " << Vowels << endl ;
cout << "AlphaNum = " << AlphaNum << endl ;
cout << "\nusing non-predicate versions" << endl ;
//non-predicate set_difference
last = set_difference(Alphabet, Alphabet+lenA,
AlphaNum, AlphaNum+lenAN,
result) ;
*last = 0 ;
cout << "set_difference(Alphabet, AlphaNum) = " << result << endl ;
//non-predicate set_intersection
last = set_intersection(Alphabet, Alphabet+lenA,
AlphaNum, AlphaNum+lenAN,
result) ;
*last = 0 ;
cout << "set_intersection(Alphabet, AlphaNum) = " << result << endl ;
//non-predicate set_symmetric_difference
last = set_symmetric_difference(Alphabet, Alphabet+lenA,
Vowels , Vowels +lenV,
result) ;
*last = 0 ;
cout << "set_symmetric_difference(Alphabet, Vowels) = " << result << endl ;
//non-predicate set_union
last = set_union(Alphabet, Alphabet+lenA,
AlphaNum, AlphaNum+lenAN,
result) ;
*last = 0 ;
cout << "set_union(Alphabet, AlphaNum) = " << result << endl ;
cout << "\nusing predicate versions" << endl ;
//predicate set_difference
last = set_difference(Alphabet, Alphabet+lenA,
AlphaNum, AlphaNum+lenAN,
result , less<char>()) ;
*last = 0 ;
cout << "set_difference(Alphabet, AlphaNum) = " << result << endl ;
//predicate set_intersection
last = set_intersection(Alphabet, Alphabet+lenA,
AlphaNum, AlphaNum+lenAN,
result , less<char>()) ;
*last = 0 ;
cout << "set_intersection(Alphabet, AlphaNum) = " << result << endl ;
//predicate set_symmetric_difference
last = set_symmetric_difference(Alphabet, Alphabet+lenA,
Vowels , Vowels +lenV,
result , less<char>()) ;
*last = 0 ;
cout << "set_symmetric_difference(Alphabet, Vowels) = " << result << endl ;
//predicate set_union
last = set_union(Alphabet, Alphabet+lenA,
AlphaNum, AlphaNum+lenAN,
result , less<char>()) ;
*last = 0 ;
cout << "set_union(Alphabet, AlphaNum) = " << result << endl ;
return 0 ;
}
system("dir /b /a-d c:\\*.* >d:\\allfiles.txt");
//读文件d:\\allfiles.txt的内容即C:\\下所有文件的名字
system("dir /b /a-d /s c:\\*.* >d:\\allfilesinsub.txt");
//读文件d:\\allfilesinsub.txt的内容即C:\\下所有文件的名字包含子目录
system("dir /b /ad c:\\*.* >d:\\alldirs.txt");
//读文件d:\\alldirs.txt的内容即C:\\下所有子目录的名字
请记住,能用shell命令获取文件、文件夹信息或者操作文件、文件夹最好用shell命令获取或者操作,而不要用各种API获取或者操作,因为当遇到非法文件夹名或非法文件名或非法文件长度、非法文件日期、压缩文件、链接文件、稀疏文件……等各种意料之外的情况时,API会处理的不全面或陷入死循环,而shell命令不会。
如果嫌system黑窗口一闪,将system("...")替换为WinExec("cmd /c ...",SW_HIDE);