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Hi Team

I have a problem and need help, i have class program that uses data structure and need to implement a test function and be able to print it for values that associate with it by using std::map. Below is my code

What I have tried:

C++
#include <iostream>
#include <map>


class interval_map {
    friend void IntervalMapTest();
    V m_valBegin;
    typedef std::map<K,V> m_map;
    
public:
    // constructor associates whole range of K with val
    interval_map(V const& val)
    : m_valBegin(val)
    {}

    // Assign value val to interval [keyBegin, keyEnd).
    // Overwrite previous values in this interval.
    // Conforming to the C++ Standard Library conventions, the interval
    // includes keyBegin, but excludes keyEnd.
    // If !( keyBegin < keyEnd ), this designates an empty interval,
    // and assign must do nothing.
    void assign( K const& keyBegin, K const& keyEnd, V const& val )
    {
        for( auto it = m_map.find( keyBegin ); * it != keyEnd; ++it )
        {
            * it = val;
        }
    }
    
    // look-up of the value associated with key
    V const& operator[]( K const& key ) const {
        auto it=m_map.upper_bound(key);
        if(it==m_map.begin()) {
            return m_valBegin;
        } else {
            return (--it)->second;
       }
    }
};
Posted
Updated 13-Sep-22 17:35pm
v2
Comments
CPallini 14-Sep-22 1:58am    
Your code has many issues. You should fix it, before proceeding with the test function.

1 solution

I am not sure how this even compiles. The item m_map is declared as a typedef but I see no instance of that type declared.

Anyway, the documentation for map::begin has sample code that displays a map's contents : map::begin - C++ Reference[^].
 
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Comments
CPallini 14-Sep-22 1:57am    
My 5.
"I am not sure how this even compiles. The item m_map is declared as a typedef but I see no instance of that type declared."
Moreover it is used as instance.
Rick York 14-Sep-22 13:08pm    
Thank you, sir.

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