update

.gitignore

@@ -0,0 +1,3 @@
+.vscode
+.xmake
+build

README.md

@@ -1,2 +1,17 @@
 # VideoShows
 
+## 如何构建？
+>请先安装xmake并执行
+```bash
+
+xmake -v
+xmake r <target name>
+
+```
+>即可，如果你想用xmake构建可以使用
+```bash
+
+xmake project -k xmake
+
+```
+>生成CMakeLists.txt

printAndRange/printAndRange.cpp

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+#include <iostream>
+#include <sstream>
+
+template<typename ...Args>
+void print(const Args&...args){
+    std::stringstream ss;
+    ((ss<<args),...);
+    std::cout<<ss.str();
+}
+
+template<typename T>
+class Range{
+private:
+T _start,_end,_step;
+public:
+    constexpr Range()=delete;
+    constexpr Range(const T start,const T end,const T step)noexcept:_start(start),_end(end),_step(step){}
+    constexpr Range(const T start,const T end)noexcept:Range(start,end,1){}
+    constexpr Range(const T end)noexcept:Range(1,end,1){}
+
+    struct Iterator{
+        T current,step;
+        constexpr Iterator()=delete;
+        constexpr Iterator(const T start,const T step)noexcept:current(start),step(step){}
+        constexpr bool operator!=(const Iterator &other)const noexcept{
+            return current<other.current;
+        }
+        constexpr Iterator& operator++()noexcept{
+            current+=step;
+            return *this;
+        }
+        constexpr T operator*()const noexcept{
+            return current;
+        }
+    };
+
+    constexpr Iterator begin(){
+        return Iterator(_start,_step);
+    }
+    constexpr Iterator end(){
+        return Iterator(_end,_step);
+    }
+};
+
+
+int main(const int argc,const char* argv[]){
+    for(auto i:Range(1,11,2)){
+        for(auto j:Range(1,11,2)){
+            print("[","i: ",i," ,j: ",j,"] ");
+        }
+        print("\n");
+    }
+    print("\n");
+}

xmake.lua

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+add_rules("mode.debug","mode.release")
+
+set_warnings("all")
+set_languages("c++20")
+
+target("printAndRange")
+    add_files("printAndRange/printAndRange.cpp")