标签：stdout 包含 isa read border include stream lan 代码实现
给出一段英文，里面包含一些单词，空格和标点，单词不区分大小写，默认都为小写。按照字典序输出这些单词（这些单词不能有重复，字母全部变成小写）
Adventures in Disneyland Two blondes were going to Disneyland when they came to a fork in the road. The sign read: "Disneyland Left." So they went home.
a adventures blondes came disneyland fork going home in left read road sign so the they to two went were when
#define _CRT_SECURE_NO_WARNINGS #include <iostream> #include <set> #include <string> #include <sstream> #include <algorithm> using namespace std; set<string> dict; //单词字典 int main() { freopen("data5_3.in", "r", stdin); freopen("data5_3.out", "w", stdout); string str; while (cin >> str) { for (int i = 0; i < str.length(); i++) if (isalpha(str[i])) str[i] = tolower(str[i]); else str[i] = ‘ ‘; stringstream ss(str); while (ss >> str) dict.insert(str); } //进行打印 for (set<string>::iterator iter = dict.begin(); iter != dict.end(); iter++) cout << *iter << endl; freopen("CON", "r", stdin); freopen("CON", "w", stdout); return 0; }
clear() — to clear the stream 清空字符串流
str() — to get and set string object whose content is present in stream. 得到一个string对象
operator << — add a string to the stringstream object. 通过字符串对象得到一个stringstream对象
operator >> — read something from the stringstream object, 将stringstream对象中的数据输出到其他对象
包含：去除字符串中的空格
| 函数名称 | 返回值 |
| isalnum() | 如果参数是字母数字，即字母或数字，该函数返回true |
| isalpha() | 如果参数是字母，该函数返回真 |
| isblank() | 如果参数是空格或水平制表符，该函数返回true |
| iscntrl() | 如果参数是控制字符，该函数返回true |
| isdigit() | 如果参数是数字（0～9），该函数返回true |
| isgraph() | 如果参数是除空格之外的打印字符，该函数返回true |
| islower() | 如果参数是小写字母，该函数返回true |
| isprint() | 如果参数是打印字符（包括空格），该函数返回true |
| ispunct() | 如果参数是标点符号，该函数返回true |
| isspace() |
如果参数是标准空白字符，如空格、进纸、换行符、回车 、水平制表符或者垂直制表符，该函数返回true |
| isupper() | 如果参数是大写字母，该函数返回true |
| isxdigit() | 如果参数是十六进制的数字，即0～9、a~f、A~F，该函数返回true |
| tolower() | 如果参数是大写字符，则返回其小写，否则返回该参数 |
| toupper() | 如果参数是小写字母，则返回其大写，否则返回该参数 |
标签：stdout 包含 isa read border include stream lan 代码实现
原文地址：https://www.cnblogs.com/ssyfj/p/11512478.html
