Merge branch 'master' of gitee.com:Eyestorm/notes

code_segment/operator_reload.cpp

@@ -0,0 +1,80 @@
+#include<iostream>
+#include<vector>
+
+using namespace std;
+
+int compress(vector<char>& chars) {
+    vector<char> vec;
+    vector<int> num;
+    char lc=chars[0];
+    int ln=1;
+    int j=0;
+    for(int i=1;i<chars.size();i++){
+        if(chars[i]==lc){
+            ln++;
+        }
+        else{
+            vec[j]=lc;
+            num[j]=ln;
+            j++;
+            lc=chars[i];
+            ln=1;
+// 重载运算符。返回流本身，用于链式法则。如果需要访问私有变量
+// 需要声明为友元。一般不需要声明为友元。
+ostream & operator<<(ostream &os, const vector<int> temp)  
+{
+    for(auto a : temp){
+        os<<a<<" ";
+    }
+    os<<endl;
+    return os;
+}
+int main(){
+	vector<int> arr{-1, 3, -3, 4,5};
+    cout<<arr<<endl;
+
+  	vector<int> temp(arr.size()+1,0);
+	for(int i=0;i<arr.size();i++){
+    	if(arr[i]<arr.size()+1 && arr[i]>0){
+          temp[arr[i]]=1;
+        }
+    }
+    vec[j]=lc;
+    num[j]=ln;
+    vector<char> &res=chars;
+    res.clear();
+    for(int i=0;i<vec.size();i++){
+        res.push_back(vec[i]);
+        if(num[i]==1)continue;
+        if(num[i]>0){
+            char temp = char(num[i]%10-0+'0');
+            res.push_back(temp);
+            num[i]/=10;
+        }
+    }
+    return res.size();
+}
+
+<<<<<<< HEAD:a.cpp
+int main(){
+    vector<char> chars={'a','a','b'};
+    for(auto a:chars){
+        cout<<a<<endl;
+    }
+    compress(chars);
+
+    for(auto a:chars){
+        cout<<a;
+    }
+    cout<<endl;
+    return 0;
+}
+=======
+	return 0;
+}
+
+
+
+// 测试一下友元
+
+>>>>>>> fb01b190883e115ab7560e5401aa57540e889977:code_segment/operator_reload.cpp