1.
以上均包含在cctype中
1 #include<cctype>
2 //#include<ctype.h>
2、文件操作
(1)头文件
1 #include<fstream>
(2)写文件使用方法
//use ofstream
ofstream outFile; //File file?
ofstream fout; //open
outFile.open("test.txt");
char name[50];
cin >> name;
fout.open(name); //use
int num = 666;
outFile << num; char file[50] = "OOOOOps!"
fout << file << endl; //此条会将换行一并输入到文件中 //用完记得释放文件描述符
outFile.close();
fout.close();
(3)读取文件
//use ifstream
ifstream inFile; //File file?
ifstream fin; //open
inFile.open("test.txt");
char name[50];
cin >> name;
fin.open(name); //use
int num;
inFile >> num; //read a int num from inFile char file[50] = {};
fin.getline(file, 50); //read a line from fin to file //用完记得释放文件描述符
outFile.close();
fout.close();
(4)一些检查函数
//is open success
if(!fin.is_open()) //or .good()
exit(EXIT_FAILURE); //is eof
if(!fin.eof())
xxx; if(!fin.fail())