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