C++典型实现补充

code_segment/test2.cpp

@@ -0,0 +1,29 @@
+#include <iostream>
+#include <iomanip>
+#include <vector>
+#include <map>
+using namespace std;
+int main()
+{
+    vector<int> vec{1,2,3,4,5};
+    auto beg = vec.begin();
+    auto temp = beg+2;
+    cout<<boolalpha<<(temp>beg)<<endl;
+    cout<<*temp<<endl;
+
+    map<int,int> m;
+    m[1]=1;
+    m[2]=2;
+    m[3]=3;
+    cout<<"map:"<<endl;
+    for(auto beg1 = m.begin();beg1<m.end();beg1++){
+        cout<<(beg1->second)<<endl;
+    }
+
+    auto iter = m.begin();
+    auto temp2 = ++iter;
+    // cout<<(iter
+    // m.end())<<endl;
+    cout<<temp2->second<<endl;
+    return 0;
+}