C++写库方便自己2-CFANZ编程社区

上一篇博客我们是写到了print的重载，留下了文件，这里我们简单的贴出来，还未完善

namespace file_ {
	void newFolder(std::string name = "Test", std::string path = "") {	//默认在同级目录下创建文件夹，第一个参数表示文件夹名字，第二个是路径
		std::string temp = "md ";
		temp += path;
		temp += name;
		std::cout << "创建文件夹 " << temp << std::endl;
		system(temp.data());
	}
	//以追加模式打开写文件
	void newWriteFile(std::string name = "Test.txt", std::string data = "yyds", std::string path = "") {
		path += name;
		std::ofstream ofs;
		ofs.open(path, std::ios::app);
		ofs << data;
		ofs.close();
	}
	//创建新的文件，有就删除
	void newlyFile(std::string name = "Test.txt", std::string data = "newly", std::string path = "") {
		path += name;
		std::ofstream ofs;
		ofs.open(path, std::ios::trunc);
		ofs << data;
		ofs.close();
	}
	//删除文件的数据
	void deleteData(std::string name = "Test.txt",std::string path = "") {
		path += name;
		std::ofstream ofs(path, std::ios::trunc);
		ofs.close();
	}
	//删除文件
	void deleteFile(std::string path) {
		if (remove(path.data()) == 0) {
			std::cout << "删除成功" << std::endl;
		}
		else {
			std::cout << "删除失败" << std::endl;
		}
	}
	//读取文件
	std::string readFile(std::string path) {
		std::ifstream ifs;
		ifs.open(path, std::ios::in);
		if (!ifs.is_open())
		{
			std::cout << "文件打开失败" << std::endl;
			return "";
		}
		std::string data{};
		while (ifs >> data);
		ifs.close();
		return data;
	}
}

总体来说还是很简单的，老样子写在命名空间内，没有用到模板和重载，后期完善的时候再看，为了方便我们把实现都写在这个头文件内，所以不用在意。下面我们把测试功能的代码贴出来

#include<iostream>
#include<string>
#include<fstream>
#include<cstdio>
void newFolder(std::string s = "Test", std::string path = "") {
	std::string temp = "md ";
	temp += path;
	temp += s;
	std::cout <<"创建文件夹 " << temp  << std::endl;
	system(temp.data());
}
void newWriteFile(std::string name = "Test.txt", std::string data = "yyds", std::string path = "") {
	path += name;
	std::ofstream ofs;
	ofs.open(path, std::ios::app);
	ofs << data;
	ofs.close();
}
void deleteData(std::string name = "Test.txt", std::string path = "") {
	path += name;
	std::ofstream ofs(path, std::ios::trunc);
	ofs.close();
}
void deleteFile(std::string path = "") {
	if (remove(path.data()) == 0) { 
		std::cout << "删除成功" << std::endl; 
	}
	else {
		std::cout << "删除失败" << std::endl;
	}
}
std::string readFile(std::string path) {
	std::ifstream ifs;
	ifs.open(path, std::ios::in);
	if (!ifs.is_open())
	{
		std::cout << "文件打开失败" << std::endl;
		return "";
	}
	std::string data{};
	while (ifs >> data);
	ifs.close();
	return data;
}
int main()
{
	//newFolder("测试","D:\\自用\\");
	//newWriteFile("测试.txt", "123456");
	//deleteData("测试.txt");
	//deleteFile("测试.txt");
	std::cout << readFile("测试.txt") << std::endl;
	return 0;
}

有兴趣的可以自己再测试测试，那么加上之前写的，我们截止目前总共的代码如下：

#ifndef FUNC_H
#define FUNC_H
#include<vector>
#include<algorithm>
#include <iostream>
#include<string>
#include<iterator>
#include<list>
#include<array>
#include<fstream>
#include<fstream>
#include<cstdio>
namespace sort_ {
	void merge(int arr[], int start, int end, int mid, int* temp) {
		int i_start = start;
		int i_end = mid;
		int j_start = mid + 1;
		int j_end = end;

		int Length = 0;
		while (i_start <= i_end && j_start <= j_end) {
			if (arr[i_start] < arr[j_start])
				temp[Length++] = arr[i_start++];
			else
				temp[Length++] = arr[j_start++];
		}
		while (i_start <= i_end) {
			temp[Length++] = arr[i_start++];
		}
		while (j_start <= j_end) {
			temp[Length++] = arr[j_start++];
		}
		for (int i = 0; i < Length; i++) {
			arr[start + i] = temp[i];
		}
	}
	void mergeSort(int arr[], int start, int end, int* temp) {
		if (start >= end) {
			return;
		}
		int mid = (start + end) / 2;
		mergeSort(arr, start, mid, temp);
		mergeSort(arr, mid + 1, end, temp);
		merge(arr, start, end, mid, temp);
	}

	//快排
	template<typename T>
	void quickSort(int left, int right, std::vector<T>& arr) {
		if (left >= right)
			return;
		int i = left, j = right, base = arr[left];//取最左边的数为基准数
		while (i < j) {
			while (arr[j] >= base && i < j)
				j--;
			while (arr[i] <= base && i < j)
				i++;
			if (i < j) {
				std::swap(arr[i], arr[j]);
			}
		}
		arr[left] = arr[i];
		arr[i] = base;
		quickSort(left, i - 1, arr);
		quickSort(i + 1, right, arr);
	}
	template<typename T>
	void quickSort(int left, int right, T arr[]) {
		if (left >= right)
			return;
		int i = left, j = right, base = arr[left];//取最左边的数为基准数
		while (i < j) {
			while (arr[j] >= base && i < j)
				j--;
			while (arr[i] <= base && i < j)
				i++;
			if (i < j) {
				std::swap(arr[i], arr[j]);
			}
		}
		arr[left] = arr[i];
		arr[i] = base;
		quickSort(left, i - 1, arr);
		quickSort(i + 1, right, arr);
	}

	//选择
	template<typename T>//从小到大升序
	void selectSort(T arr[], int len) {
		for (int i = 0; i < len; i++) {
			int min = i;
			for (int j = i + 1; j < len; j++) {
				if (arr[j] < arr[min]) {
					min = j;
				}
			}
			if (min != i) {
				std::swap(arr[min], arr[i]);
			}
		}
	}
	template<typename T>
	void Inverted(T n[], int str, int end) {	//数组逆置
		if (str < end) {
			std::swap(n[str], n[end]);
			Inverted(n, str + 1, end - 1);
		}
		return;
	}
	template<typename T>
	int sum(T n[], int start, int end) {
		if (start == end)return n[start];
		int mid = (start + end) >> 1;
		return sum(n, start, mid) + sum(n, mid + 1, end);
	}//二分递归，数组求和
	double average(int n[], int start, int end) {
		return sum(n, start, end) / static_cast<double>(end + 1);
	}//二分递归，数组求和
	int fib(int n) {
		return n <= 2 ? 1 : fib(n - 1) + fib(n - 2);
	}//时间复杂度O(2^n)，空间消耗很高
	int fib2(int n) {
		int f = 0, g = 1;
		while (0 < n--) {
			g = g + f;
			f = g - f;
		}
		return g;
	}//时间复杂度O(n),空间复杂度只需要O(1)
}
namespace find_ {
	template<typename Comparable>
	int binarySearch(const std::vector<Comparable>& a, const Comparable& x)
	{
		int low = 0, hight = a.size()-1;
		while (low <= hight)
		{
			int mid = (low + hight) / 2;

			if (a[mid] < x) {
				low = mid + 1;
			}
			else if (a[mid] > x) {
				hight = mid - 1;
			}
			else
				return mid;		//找到的情况
		}
		return -1;
	}
	template<typename Comparable>
	int binarySearch(const Comparable *a, const Comparable x,Comparable len)
	{
		int low = 0, hight =len-1 ;
		while (low <= hight)
		{
			int mid = (low + hight) / 2;

			if (a[mid] < x) {
				low = mid + 1;
			}
			else if (a[mid] > x) {
				hight = mid - 1;
			}
			else
				return mid;		//找到的情况
		}
		return -1;
	}
}
namespace pow_ {
	double pow_(int x, size_t n)
	{
		if (n == 0)
			return 1;

		if (n == 1)
			return x;

		if (n % 2 == 0)
			return pow_(x * x, n / 2);
		else
			return pow_(x * x, n / 2) * x;
	}
	double pow_(int x, int n)
	{
		n = -n;
		return 1 / pow_(x, static_cast<size_t>(n));
	}
}
namespace maxAmin {
	template<typename T,size_t size>
	auto max(T(&n)[size]) {
		T Max{};
		for (size_t i = 0; i < size; i++) {
			if (n[i] > Max)Max = n[i];
		}
		return Max;
	}
	template<typename T>
	auto max(std::vector<T>n) {
		T Max{};
		for (size_t i = 0; i < n.size(); i++) {
			if (n[i] > Max)Max = n[i];
		}
		return Max;
	}
	template<typename T, size_t size>
	auto min(T(&n)[size]) {
		T Min = n[0];
		for (size_t i = 1; i < size; i++) {
			if (n[i] < Min)Min = n[i];
		}
		return Min;
	}
	template<typename T>
	auto min(std::vector<T>n) {
		T Min = n[0];
		for (size_t i = 1; i < n.size(); i++) {
			if (n[i] < Min)Min = n[i];
		}
		return Min;
	}
}
namespace show_ {
	template<typename T,size_t i>
	void print(const T(&n)[i], const std::string s=" ") {
		std::copy(std::begin(n),std::end(n), std::ostream_iterator<T, char>(std::cout, s.data()));//s做分隔符
		std::cout << std::endl;
	}
	template<typename T,size_t size>
	void print(const std::array<T,size> v, const std::string s = " ") {
		std::copy(std::begin(v), std::end(v), std::ostream_iterator<T, char>(std::cout, s.data()));//s做分隔符
		std::cout << std::endl;
	}
	void print(const char* s) {
		std::cout << s << std::endl;											//重载特殊情况，字符串常量输出
	}
	template<typename T>
	void print(const std::vector<T>n,const std::string s=" ") {
		std::copy(std::begin(n), std::end(n), std::ostream_iterator<T, char>(std::cout, s.data()));//s做分隔符
		std::endl(std::cout);
	}
	template<typename T>
	void print(const T v) {
		std::cout << v << std::endl;
	}
	template<typename T>
	void print(const std::list<T>& L,std::string s=" ") {
		for (auto it = L.begin(); it != L.end(); it++) {										//list容器版本
			std::cout << *it << s;
		}
		std::cout << std::endl;
	}
	template<typename...Args>													//折叠表达式，用于输出一堆东西
	void prints(Args...args) {
		((std::cout << args << ","), ...);
	}
}
namespace file_ {
	void newFolder(std::string name = "Test", std::string path = "") {	//默认在同级目录下创建文件夹，第一个参数表示文件夹名字，第二个是路径
		std::string temp = "md ";
		temp += path;
		temp += name;
		std::cout << "创建文件夹 " << temp << std::endl;
		system(temp.data());
	}
	//以追加模式打开写文件
	void newWriteFile(std::string name = "Test.txt", std::string data = "yyds", std::string path = "") {
		path += name;
		std::ofstream ofs;
		ofs.open(path, std::ios::app);
		ofs << data;
		ofs.close();
	}
	//创建新的文件，有就删除
	void newlyFile(std::string name = "Test.txt", std::string data = "newly", std::string path = "") {
		path += name;
		std::ofstream ofs;
		ofs.open(path, std::ios::trunc);
		ofs << data;
		ofs.close();
	}
	//删除文件的数据
	void deleteData(std::string name = "Test.txt",std::string path = "") {
		path += name;
		std::ofstream ofs(path, std::ios::trunc);
		ofs.close();
	}
	//删除文件
	void deleteFile(std::string path) {
		if (remove(path.data()) == 0) {
			std::cout << "删除成功" << std::endl;
		}
		else {
			std::cout << "删除失败" << std::endl;
		}
	}
	//读取文件
	std::string readFile(std::string path) {
		std::ifstream ifs;
		ifs.open(path, std::ios::in);
		if (!ifs.is_open())
		{
			std::cout << "文件打开失败" << std::endl;
			return "";
		}
		std::string data{};
		while (ifs >> data);
		ifs.close();
		return data;
	}
}
#endif

纯属随便写写而已，个人觉得没有什么技术含量，环境是MSVC，C++20，debug，未开启优化，下次再见