C++STLトレーナー(mapの使用)

2700 ワード

vectorの使用

listの使用

dequeの使用

setの使用

mapの使用

multisetの使用

multimapの使用

#include   
#include   
#include   
using namespace std;  
  
int main()  
{  
    ///1.      
    map mapStudent;  
    map::iterator iter, beg, end;  
  
    ///2.       
    mapStudent[0] = "student_one";  
    mapStudent[1] = "student_two";  
    mapStudent[2] = "student_three";  
    mapStudent.insert(pair(5, "Fear Kubrick"));  
    mapStudent.insert(pair(2, "Akemi Homura"));  
    mapStudent.insert(pair(-1, "Eren Jaeger"));  
    mapStudent.insert(pair(99, "lin"));  
    cout << mapStudent.size() << endl;  
    cout << endl;  
  
    ///3.     
    ///        ，         ，          map!  
    for (iter = mapStudent.begin(); iter != mapStudent.end(); iter++)  
        cout << iter->first << " " << iter->second << endl;  
    cout << endl;  
  
    ///4.     
    ///   3       ，    key  map ，            key      
    /// find(key)    
    iter = mapStudent.find(1);  
    if (iter != mapStudent.end())  
        cout << iter->second << endl;  
    else  
        cout << -1 << endl;  
    iter = mapStudent.find(6);  
    if (iter != mapStudent.end())  
        cout << iter->second << endl;  
    else  
        cout << -1 << endl;  
    cout << endl;  
  
    ///5.     
    ///      
    iter = mapStudent.find(1);  
    if (iter != mapStudent.end())  
        mapStudent.erase(iter);  
    cout << mapStudent.size() << endl;  
    for (iter = mapStudent.begin(); iter != mapStudent.end(); iter++)  
        cout << iter->first << " " << iter->second << endl;  
  
    ///      
    beg = mapStudent.find(-1);  
    end = mapStudent.find(5);  
    if (beg != mapStudent.end() && end != mapStudent.end())  
        mapStudent.erase(beg, end);///  beg end     ，   end  
        ///    end   ，     ：mapStudent.erase(beg, ++end);  
        ///        end = mapStudent.upper_bound(5);  
    cout << mapStudent.size() << endl;  
    for (iter = mapStudent.begin(); iter != mapStudent.end(); iter++)  
        cout << iter->first << " " << iter->second << endl;  
    cout << endl;  
  
    ///6.        
    if (!mapStudent.empty())  
        mapStudent.clear();  
}

[C++] while or for find_if関数オブジェクトlambda

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