map<int, string>::iterator iter; iter = mapStudent.find(1); if(iter != mapStudent.end()) { Cout<<”Find, the value is ”<<iter->second<<endl; } Else { Cout<<”Do not Find”<<endl; } } 版权声明:本文内容由互联网用户自发贡献,该文观点仅代表作者本人。本站仅提供信息存储空间服务,...
AI代码解释 //迭代器刪除iter=mapStudent.find("123");mapStudent.erase(iter);//用关键字刪除int n=mapStudent.erase("123");//如果刪除了會返回1,否則返回0//用迭代器范围刪除 : 把整个map清空mapStudent.erase(mapStudent.begin(),mapStudent.end());//等同于mapStudent.clear() 8,map的大小 在往map...
1//map::find2#include <iostream>3#include <map>45intmain ()6{7std::map<char,int>mymap;8std::map<char,int>::iterator it;910mymap['a']=50;11mymap['b']=100;12mymap['c']=150;13mymap['d']=200;1415it = mymap.find('b');16if(it !=mymap.end())17mymap.erase (it);1...
my_Itr.find(2); int j = my_Itr->second; my_Itr->second = j; 注意: A.键本身是不能被修改的,除非删除。 B.不管键存不存在,比如my_Map[1] = i;,都会执行赋值操作。 5. 删除数据 (1) my_Map.erase(my_Itr); (2) my_Map.erase(3); 6. 遍历数据 复制代码 代码如下: for(my_Itr=my...
(2) Map.insert(pair<string,int>("c",3)); (3) Map.insert(make_pair<string,int>("d",4)); 三、修改、查找元素 (1)修改Map["sunquan"]=11111; (2)查找数据:可以通过键来查,语法:Map.find(key); 这样会返回迭代器的地址,key不存在的话迭代器的值为Map.end(); ...
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FindIdentical 示例 4:按 FEAT_SEQ 值对相同记录进行分组(独立脚本) 读取FindIdentical工具的输出并按 FEAT_SEQ 值对相同记录进行分组。 importarcpyfromitertoolsimportgroupbyfromoperatorimportitemgetter# Set workspace environmentarcpy.env.workspace=r"C:\data\redlands.gdb"# Run Find Identical on feature geometry...
[a 1] [b 2] [c 3] find A = False find b = [b 2] find C = False map::generic_container컨테이너에 대한 제네릭 인터페이스의 형식입니다.구문C++ 복사 typedef Microsoft::VisualC::StlClr:: ITree<GKey, GValue> generic_container; 설...
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