答:
答:
答:
#include <iostream>
#include <string>
#include <map>
using namespace std;
int main() {
map<string, size_t> word_count;
string word;
while (cin >> word) {
++word_count[word];
}
for (const auto &w : word_count) {
cout << w.first << " occurs " << w.second << ((w.second > 1) ? " times" : " time") << endl;
}
return 0;
}
答:
#include <iostream>
#include <string>
#include <map>
#include <cctype>
using namespace std;
string processWord(const string& word) {
string result;
for (char ch : word) {
if (!ispunct(ch)) {
result += tolower(ch);
}
}
return result;
}
int main() {
map<string, size_t> word_count;
string word;
while (cin >> word) {
string processed_word = processWord(word);
++word_count[processed_word];
}
for (const auto &w : word_count) {
cout << w.first << " occurs " << w.second << ((w.second > 1) ? " times" : " time") << endl;
}
return 0;
}
答:
答:
答:
#include <iostream>
#include <string>
#include <map>
#include <vector>
using namespace std;
void addFamily(map<string, vector<string>>& families, const string& surname) {
families[surname] = vector<string>();
}
void addChild(map<string, vector<string>>& families, const string& surname, const string& childName) {
families[surname].push_back(childName);
}
int main() {
map<string, vector<string>> families;
// 添加一个新的家庭
addFamily(families, "Smith");
// 向Smith家庭添加孩子
addChild(families, "Smith", "John");
addChild(families, "Smith", "Jane");
// 添加另一个家庭
addFamily(families, "Johnson");
// 向Johnson家庭添加孩子
addChild(families, "Johnson", "Emily");
addChild(families, "Johnson", "Ella");
// 打印家庭及其孩子
for (const auto& family : families) {
cout << "Family surname: " << family.first << endl;
cout << "Children: ";
for (const auto& child : family.second) {
cout << child << " ";
}
cout << endl;
}
return 0;
}
答:
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
int main() {
vector<string> words;
string word;
while (cin >> word) {
// 使用 std::find 检查 word 是否已经在 vector 中
if (find(words.begin(), words.end(), word) == words.end()) {
words.push_back(word);
}
}
for (const auto &w : words) {
cout << w << endl;
}
return 0;
}
答:
map<string, list<int>> search;
答:
答:
multiset<Sales_data, bool(*)(const Sales_data &, const Sales_data &)>bookstore(compareIsbn);
答:
#include <iostream>
#include <vector>
#include <string>
#include <utility>
using namespace std;
int main() {
vector<pair<string, int>> vec;
string str;
int num;
cout << "Enter pairs of string and int (Enter 'exit' as string to stop):" << endl;
while (true) {
cin >> str;
if (str == "exit") {
break;
}
cin >> num;
vec.push_back(make_pair(str, num));
}
cout << "Pairs in vector are:" << endl;
for (const auto &p : vec) {
cout << p.first << ": " << p.second << endl;
}
return 0;
}
答:
vec.push_back(pair<string, int>(str, num));
vec.push_back(make_pair(str, num));
vec.push_back({str, num});
答:
#include <iostream>
#include <string>
#include <map>
#include <vector>
using namespace std;
void addFamily(map<string, vector<pair<string, string>>>& families, const string& surname) {
families[surname] = vector<pair<string, string>>();
}
void addChild(map<string, vector<pair<string, string>>>& families, const string& surname
, const string& childName, const string& birthday) {
families[surname].push_back({ childName, birthday });
}
int main() {
map<string, vector<pair<string, string>>> families;
// 添加一个新的家庭
addFamily(families, "Smith");
// 向Smith家庭添加孩子
addChild(families, "Smith", "John", "2005-01-15");
addChild(families, "Smith", "Jane", "2008-06-20");
// 添加另一个家庭
addFamily(families, "Johnson");
// 向Johnson家庭添加孩子
addChild(families, "Johnson", "Emily", "2010-09-12");
addChild(families, "Johnson", "Ella", "2012-03-30");
// 打印家庭及其孩子
for (const auto& family : families) {
cout << "Family surname: " << family.first << endl;
cout << "Children: ";
for (const auto& child : family.second) {
cout << child.first << " (Birthday: " << child.second << ") ";
}
cout << endl;
}
return 0;
}
答:
答:
#include <iostream>
#include <string>
#include <map>
int main() {
std::map<std::string, int> word_count;
word_count["hello"] = 1;
word_count["world"] = 2;
// 使用迭代器为 "hello" 对应的 value 赋新值
std::map<std::string, int>::iterator it = word_count.find("hello");
if (it != word_count.end()) {
it->second = 9; // 使用迭代器修改value
}
for (const auto &item : word_count) {
std::cout << item.first << ": " << item.second << std::endl;
}
return 0;
}
copy(v.begin(), v.end(), inserter(c, c.end()));
copy(v.begin(), v.end(), back_inserter(c));
copy(c.begin(), c.end(), inserter(v, v.end()));
copy(c.begin(), c.end(), back_inserter(v));
答:
答:
map<string, size_t>::const_iterator map_it
答:
multiset<Sales_data, bool(*)(const Sales_data &, const Sales_data &)>::iterator msetIt = bookstore.begin();
答:
#include <iostream>
#include <string>
#include <map>
using namespace std;
int main() {
map<string, size_t> word_count;
string word;
while (cin >> word) {
auto ret = word_count.insert({ word, 1 });
if (!ret.second)
++ret.first->second;
}
for (const auto &w : word_count) {
cout << w.first << " occurs " << w.second << ((w.second > 1) ? " times" : " time") << endl;
}
return 0;
}
while (cin >> word)
++word_count.insert({word, 0}).first->second;
答:
答:
答:
#include <iostream>
#include <string>
#include <map>
using namespace std;
void addChild(multimap<string, string>& families, const string& surname, const string& childName) {
families.insert({ surname, childName });
}
int main() {
multimap<string, string> families;
addChild(families, "Smith", "John");
addChild(families, "Smith", "Jane");
addChild(families, "Johnson", "Emily");
addChild(families, "Johnson", "Ella");
string current_family;
for (const auto& entry : families) {
if (current_family != entry.first) {
if (!current_family.empty()) {
cout << endl; // 把不同的家庭分开
}
cout << "Family surname: " << entry.first << endl;
current_family = entry.first;
cout << "Children: ";
}
cout << entry.second << " ";
}
return 0;
}
map<int, int> m;
m[0] = 1;
答:
vector<int> v;
v[0] = 1;
答:
答:
#include <iostream>
#include <string>
#include <map>
int main() {
// 定义一个map
std::map<std::string, int> word_count;
// 对map进行下标操作的类型:std::string
word_count[std::string("apple")] = 1;
// 下标运算符将会返回的类型:int
int apple_count = word_count["apple"];
std::cout << "apple: " << apple_count << std::endl; // 输出:apple: 1
return 0;
}
答:
答:
map<string, vector<int>> m;
map<string, vector<int>>::iterator it = m.find("hello");
答:
答:
答:
#include <iostream>
#include <string>
#include <map>
using namespace std;
int main() {
multimap<string, string> authors;
// 初始化作者及其作品
authors.insert({ "Barth, John", "Sot-Weed Factor" });
authors.insert({ "Barth, John", "Lost in the Funhouse" });
authors.insert({ "Rowling, J.K.", "Harry Potter" });
authors.insert({ "Tolkien, J.R.R.", "The Lord of the Rings" });
string search_author, search_title;
cout << "Enter the author's name: ";
getline(cin, search_author);
cout << "Enter the title of the work: ";
getline(cin, search_title);
auto it = authors.find(search_author);
bool erased = false;
// 使用find在multimap中查找元素
while (it != authors.end() && it->first == search_author) {
if (it->second == search_title) {
authors.erase(it); // 删除找到的元素
erased = true;
break;
}
++it;
}
if (erased) {
cout << "The work titled '" << search_title << "' by " << search_author << " was erased." << endl;
} else {
cout << "The work titled '" << search_title << "' by " << search_author << " was not found." << endl;
}
return 0;
}
答:
#include <iostream>
#include <map>
#include <set>
#include <string>
using namespace std;
int main() {
multimap<string, string> authors;
// 插入作者和他们的作品
authors.insert({ "Austen, Jane", "Pride and Prejudice" });
authors.insert({ "Austen, Jane", "Emma" });
authors.insert({ "Tolkien, J.R.R.", "The Hobbit" });
authors.insert({ "Tolkien, J.R.R.", "The Silmarillion" });
authors.insert({ "Tolkien, J.R.R.", "The Lord of the Rings" });
authors.insert({ "Orwell, George", "1984" });
authors.insert({ "Orwell, George", "Animal Farm" });
// 当前正在处理的作者的名字
string current_author = "";
set<string> works; // 用于暂存当前作者的作品并按字典序排列
for (const auto &item : authors) {
if (current_author != item.first) {
if (!works.empty()) {
for (const auto &work : works) {
cout << "\t" << work << endl;
}
works.clear(); // 清空已打印的作品列表
}
current_author = item.first;
cout << current_author << ":\n";
}
works.insert(item.second);
}
// 打印最后一个作者的作品
for (const auto &work : works) {
cout << "\t" << work << endl;
}
return 0;
}
答:
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <map>
using namespace std;
map<string, string> buildMap(ifstream &map_file) {
map<string, string> trans_map;
string key;
string value;
while (map_file >> key && getline(map_file, value)) {
if (value.size() > 1) {
trans_map[key] = value.substr(1);
} else {
throw runtime_error("no rule for " + key);
}
}
return trans_map;
}
const string &transform(const string &s, const map<string, string> &m) {
auto map_it = m.find(s);
if (map_it != m.cend()) {
return map_it->second;
} else {
return s;
}
}
void word_transform(ifstream &map_file, ifstream &input) {
auto trans_map = buildMap(map_file);
string text;
while (getline(input, text)) {
istringstream stream(text);
string word;
bool firstword = true;
while (stream >> word) {
if (firstword) {
firstword = false;
} else {
cout << " ";
}
cout << transform(word, trans_map);
}
cout << endl;
}
}
int main() {
ifstream mapRule("rule.txt"), strText("input.txt");
if (!mapRule&&!strText) {
std::cerr << "Can not open the file!" << std::endl;
return -1;
}
word_transform(mapRule, strText);
return 0;
}
答:
trans_map[key] = value.substr(1);
改为 trans_map.insert({ key, value.substr(1) })
答:
答:
答:
答:
#include <iostream>
#include <string>
#include <unordered_map>
using namespace std;
int main() {
unordered_map<string, size_t> word_count; // 使用unordered_map而不是map
string word;
while (cin >> word) {
++word_count[word];
}
for (const auto &w : word_count) {
cout << w.first << " occurs " << w.second << ((w.second > 1) ? " times" : " time") << endl;
}
return 0;
}
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <unordered_map>
using namespace std;
unordered_map<string, string> buildMap(ifstream &map_file) {
unordered_map<string, string> trans_map;
string key;
string value;
while (map_file >> key && getline(map_file, value)) {
if (value.size() > 1) {
trans_map[key] = value.substr(1);
} else {
throw runtime_error("no rule for " + key);
}
}
return trans_map;
}
const string &transform(const string &s, const unordered_map<string, string> &m) {
auto map_it = m.find(s);
if (map_it != m.cend()) {
return map_it->second;
} else {
return s;
}
}
void word_transform(ifstream &map_file, ifstream &input) {
auto trans_map = buildMap(map_file);
string text;
while (getline(input, text)) {
istringstream stream(text);
string word;
bool firstword = true;
while (stream >> word) {
if (firstword) {
firstword = false;
} else {
cout << " ";
}
cout << transform(word, trans_map);
}
cout << endl;
}
}
int main() {
ifstream mapRule("rule.txt"), strText("input.txt");
if (!mapRule && !strText) {
std::cerr << "Can not open the file!" << std::endl;
return -1;
}
word_transform(mapRule, strText);
return 0;
}
文章浏览阅读451次。dev/mem: 物理内存的全镜像。可以用来访问物理内存。/dev/kmem: kernel看到的虚拟内存的全镜像。可以用来访问kernel的内容。调试嵌入式Linux内核时,可能需要查看某个内核变量的值。/dev/kmem正好提供了访问内核虚拟内存的途径。现在的内核大都默认禁用了/dev/kmem,打开的方法是在 make menuconfig中选中 device drivers --> ..._dev/mem 源码实现
文章浏览阅读7.1k次,点赞2次,收藏19次。vxe-table,一个小众但功能齐全并支持excel操作的vue表格组件_vxe-table
文章浏览阅读62次。参考:http://www.ruanyifeng.com/blog/2016/01/babel.htmlBabelBabel是一个广泛使用的转码器,可以将ES6代码转为ES5代码,从而在现有环境执行// 转码前input.map(item => item + 1);// 转码后input.map(function (item) { return item..._让开发环境支持bable
文章浏览阅读2.8k次,点赞6次,收藏29次。摘要:FPGA视频处理FIFO的典型应用,视频输入FIFO的作用,视频输出FIFO的作用,视频数据跨时钟域FIFO,视频缩放FIFO的作用_fpga 频分复用 视频
文章浏览阅读575次。【代码】R语言:设置工作路径为当前文件存储路径。_r语言设置工作目录到目标文件夹
文章浏览阅读452次。格式:background: linear-gradient(direction, color-stop1, color-stop2, ...);<linear-gradient> = linear-gradient([ [ <angle> | to <side-or-corner>] ,]? &l..._background线性渐变
文章浏览阅读1k次,点赞26次,收藏8次。第十三届蓝桥杯青少年组python编程省赛真题一、题目要求(注:input()输入函数的括号中不允许添加任何信息)1、编程实现给定一个正整数N,输出正整数N中各数位最大的那个数字。例如:N=132,则输出3。2、输入输出输入描述:只有一行,输入一个正整数N输出描述:只有一行,输出正整数N中各数位最大的那个数字输入样例:
文章浏览阅读2.2k次。一个网络协议主要由以下三个要素组成:1.语法数据与控制信息的结构或格式,包括数据的组织方式、编码方式、信号电平的表示方式等。2.语义即需要发出何种控制信息,完成何种动作,以及做出何种应答,以实现数据交换的协调和差错处理。3.时序即事件实现顺序的详细说明,以实现速率匹配和排序。不完整理解:语法表示长什么样,语义表示能干什么,时序表示排序。转载于:https://blog.51cto.com/98..._网络协议三要素csdn
文章浏览阅读153次。主要的思想,将所有的系统都可以看作两部分,真正的数据log系统和各种各样的query engine所有的一致性由log系统来保证,其他各种query engine不需要考虑一致性,安全性,只需要不停的从log系统来同步数据,如果数据丢失或crash可以从log系统replay来恢复可以看出kafka系统在linkedin中的重要地位,不光是d..._the log: what every software engineer should know about real-time data's uni
文章浏览阅读746次。伟大是熬出来的 目录 前言 引言 时间熬成伟大:领导者要像狼一样坚忍 第一章 内圣外王——领导者的心态修炼 1. 天纵英才的自信心 2. 上天揽月的企图心 3. 誓不回头的决心 4. 宠辱不惊的平常心 5. 换位思考的同理心 6. 激情四射的热心 第二章 日清日高——领导者的高效能修炼 7. 积极主动,想到做到 8. 合理掌控自己的时间和生命 9. 制定目标,马..._当狼拖着受伤的右腿逃生时,右腿会成为前进的阻碍,它会毫不犹豫撕咬断自己的腿, 以
文章浏览阅读285次。在当今的大数据时代,人们对高速度和高带宽的需求越来越大,迫切希望有一种新型产品来作为高性能计算和数据中心的主要传输媒质,所以有源光缆(AOC)在这种环境下诞生了。有源光缆究竟是什么呢?应用在哪些领域,有什么优势呢?易天将为您解答!有源光缆(Active Optical Cables,简称AOC)是两端装有光收发器件的光纤线缆,主要构成部件分为光路和电路两部分。作为一种高性能计..._aoc 光缆
文章浏览阅读2.2k次。在“桌面”上按快捷键“Ctrl+R”,调出“运行”窗口。接着,在“打开”后的输入框中输入“Gpedit.msc”。并按“确定”按钮。如下图 找到“用户配置”下的“Windows设置”下的“Internet Explorer 维护”的“连接”,双击选择“自动浏览器配置”。如下图 选择“自动启动配置”,并在下面的“自动代理URL”中填写相应的PAC文件地址。如下..._設置proxy腳本