support bazel complie this project and format code.

practical_exercises/key_exercises/map_insert_look.cpp

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+/* 字典插入与查找.cpp */
+#include <cstring>
+#include <iostream>
+#include <map>
+using namespace std;
+
+int main(int argc, char const *argv[]) {
+  map<const char *, const char *> mp;
+  map<const char *, const char *>::iterator iter;
+  const char key[3][20] = {"img", "system", "ip"};
+  const char value[3][20] = {"d:/a.img", "win7", "193.68.6.3"};
+
+  // make_pair插入
+  for (int i = 0; i < 2; i++) {
+    mp.insert(make_pair(key[i], value[i]));
+  }
+  // pair<const char*,const char*>插入
+  mp.insert(pair<const char *, const char *>(key[2], value[2]));
+
+  //数组插入方式
+  mp["addr"] = "中国";
+  //迭代器取出元素
+  //循环取出元素
+  for (iter = mp.begin(); iter != mp.end(); iter++) {
+    cout << iter->first << "\t" << iter->second << endl;
+  }
+  char key1[20];
+  cout << "请输入按key查找：";
+  cin.getline(key1, 20);
+  //查找元素
+  for (iter = mp.begin(); iter != mp.end(); iter++) {
+    if (strcmp(iter->first, key1) == 0) {
+      cout << iter->first << "查找出来了！"
+           << "对应的值为：" << iter->second << endl;
+    }
+  }
+
+  //第一种删除方式
+  // find只能用于查找数组建立的形式！并且不支持输入用cin等
+  iter = mp.find("addr");
+  if (iter != mp.end()) {
+    cout << iter->first << "按照key查找出来了！"
+         << "对应的value为：" << iter->second << endl;
+    cout << "开始删除元素！" << endl;
+    mp.erase(iter);
+    // break;
+  }
+  //第二种方式删除
+  //按照key删除元素
+  char drop_key[20];
+  //按照value删除元素
+  char drop_value[20];
+  cout << "请输入按key删除：";
+  cin.getline(drop_key, 20);
+  cout << "请输入按value删除：";
+  cin.getline(drop_value, 20);
+  for (iter = mp.begin(); iter != mp.end(); iter++) {
+    if (strcmp(iter->first, drop_key) == 0) {
+      cout << iter->first << "按照key查找出来了！"
+           << "对应的value为：" << iter->second << endl;
+      cout << "开始删除元素！" << endl;
+      mp.erase(iter);
+      break;
+    }
+    if (strcmp(iter->second, drop_value) == 0) {
+      cout << iter->second << "value查找出来了！"
+           << "对应的key为：" << iter->first << endl;
+      cout << "开始删除元素！" << endl;
+      mp.erase(iter);
+      break;
+    }
+  }
+  cout << "------删除元素以后--------\n";
+  //循环取出元素
+  for (iter = mp.begin(); iter != mp.end(); iter++) {
+    cout << iter->first << "\t" << iter->second << endl;
+  }
+  
+  return 0;
+}