How To Create C++ Dictionary

How To Create C++ Dictionary?

Are you ready to know about the power of C++ dictionaries? Look no further! In this article, we will discuss “How to Create C++ Dictionary“? We’ll walk you through the step-by-step process of creating C++ dictionaries. Discover the implementation methods to make your understanding better. Still, if you have any doubts related to this topic or facing any issues with C++ homework help, then you can hire our services.

But before we start writing about the implementation process of the Dictionary in C++ programming language, there is a need to understand the Dictionary concept briefly. So, let us have a look there.

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How To Create C++ Dictionary

 

What Is a C++ Dictionary? Get To Know

 

You might be thinking that C++ Dictionary will help to find out words like a normal dictionary. But you are wrong here. 

C++ Dictionary is a container where a programmer can store a large number of elements. Now, you might ask in the array also, we can store the data, so what is the necessity of the C++ Dictionary? Now, in the array, can you find any element with a particular value?

You can use the index number, but for that also, there is a need to know the particular index number. In the case of the C++ Dictionary, there you can store an unlimited number of elements that will not occupy much memory space. Also, the key values can be used for printing purposes.

C++ programming language has many uses to know more about applications and uses of C,  you can check out our article.

 In the C++ programming language, there is no Dictionary concept present.

It is a concept that is related to the Python programming language. But in the C++ programming language, there is a concept present that works the same as the dictionary, it is known as the Map object. 

 

How To Create The C++ Dictionary?

 

Now, after having a piece of good knowledge about the Dictionary in C++ programming language, there is a need to implement it we need to follow some steps. That is the reason, we have made the total process in a step-by-step format.

  • Declaration Of The Header File:

There is a need to declare a separate header file in C++ programming. For using the Map concept in C++ programming, there is a need to declare a special header file. It is the file that will help to do all the operations on the Map concept. And as the Map is the Dictionary in C++ programming language, we need to import the #include <map> header file to the programming.

#include <iostream> // Declaration Of The Normal Header File
#include <map> // The Necessary Important Header File For Dictionary
  • Declaration Of The Map:

After we declared the header file in the programming, there is a need to declare the Map also. We need to first provide the keyword ‘map’ for declaration. Then we are going to provide the data types of the Element & Key Values. At last, there is a need to provide the name of the Map object in C++ programming language.

General Syntax: map<Element Data Type, Key Value Data Type>Map-Name;

  • Providing Elements & Key Values:

After the declaration of the Map in C++ programming language, there is a need to provide the elements & key values to it. to provide the values, there is a need to follow a special method. The elements that are needed to be inserted into the Map object in C++ programming language, should be placed in the braces. 

storage["Books"] = "Shelf"; // Book Is Element & Shelf Is Key Value

storage["Foods & Drinks"] = "Fridge"; // Foods & Drinks are Element & Fridge Is
Key Value

storage["Cloths"] = "Wardrobe"; // Cloths Is Element & Wardrobe Is Key Value
  • Implementation Of Loop:

After doing all these things, there is a need to develop a loop. Among them, there is a need to implement the for each loop. Because there is a need to access all the elements that are present in the Map in C++ programming language.

To access these data, there is a need to use the Dot(.) operator. After the name of the Map in C++ programming language, we need to use two keywords to access them. You might have learned loops in Python and C programming as well and most of the students get stuck in the implementation of Loop due to a lack of concept clarity. In this case, they can take C Help from Industry experts and excel in their C course.

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The first one will be the keyword ‘first’ which will help to access the elements that are inserted into the Map in C++ programming language. And the other one will be the ‘second’ keyword that will help to access the key values. 

 

for (auto element :storage) { // Running A For Loop To Get All The Elements
cout<<element.first<<" Can Be Stored In "<<element.second<<endl;

Let us try to find out an entire code where all the above code snippets will collaborate to make a complete example. Let us have a look at the following example.

How To Implement a Complete C++ Dictionary?

Example:
#include <iostream> // Declaration Of The Header File

#include <map> // The Necessary Important Header File For Dictionary

#include <string> using namespace std;

int main(){

map<string, string>storage; // Declaration Of Dictionary or The Map

// Assigning Elements To Dictionary, First One Is The Element In The Braced & The Second One Is The Key Value 

storage["Books"] = "Shelf"; storage["Foods & Drinks"] = "Fridge";storage["Cloths"] = "Wardrobe";

for (auto element :storage) { // Running A For Loop To Get All The Elements

cout<<element.first<<" Can Be Stored In "<<element.second<<endl; // Printing Each & Every Element }return 0;}


Let us try to find out the output of the above code. It will help to understand the process to implement Dictionary in C++ programming language.

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Output:

 

Implementation of C++ Dictionary

From the above output, we can see that the values & the key pairs are shown properly. So, the Dictionary of the C++ programming language works properly in the example.

Now, in the above step-by-step implementation process, we have discussed the creation method of one empty Dictionary in the C++ programming language. But we intend to know all the methods that lead to the creation of the Dictionary.

So, a Dictionary can also be created with the help of another Dictionary. We are going to know about that.

How To Create A Dictionary From Another Dictionary In C++?

Overview Of Concept:

It is the simplest process to implement. From one already existing Map or Dictionary, one can create another Dictionary & store the object. For that purpose, there is a special syntax present.

According to the new syntax, the existing Dictionary name should be provided first. Following that, the new Dictionary where the details should be copied needs to be posted. And hence, without any issue, the details will be copied.

General Syntax: map <first data type , second data type> existed-map-name(new-map-name);

 

How To Implement a C++ Dictionary From Another Dictionary?

 

#include <iostream>
#include <map>
using namespace std;

int main() {
map <string, int> first = {{"Jerry", 10}, {"Tom", 20}}; // Implementation Of First Map
map <string, int> two(first); // Copying All The Items To Another Dictionary
for (auto a = two.begin(); a != two.end(); ++a) { // Implementation Of For Loop
cout << a->first << " Is " << a->second << " Years Old" << endl; // Printing The Data
}
return 0;
}

Steps Of The Program To Implement a C++ Dictionary From Another Dictionary:

  1. First, implement one Dictionary & provide some value to it. It will be used to copy data.
  2. Now, using the above syntax copy the content of the first Dictionary to the second Dictionary.
  3. Implement one for loop & using that extract all the elements & key values of the Dictionary. It will be printed on the screen.

Let us try to find out the output of the above code. It will help to understand the process to develop Dictionary in C++ programming language.

Output:

 

Implement a C++ Dictionary From Another Dictionary Output

 

What are the Highlights Of the C++ Dictionary?

 

Now, before we move to answer the question of how to create a C++ Dictionary, there is a need to memorize some features or highlights related to the C++ Dictionary. We are going to make a list of highlights below. 

Let us try to make a list of highlights related to the C++ Dictionary. They are the following:

  • There is no concept present in the C++ programming language as Dictionary. In the C++ programming language, there is a concept called Map object. It works the same as the dictionary.
  • The Dictionary works as the container in the C++ programming language. It helps to store a large number of data in it. All the data present here has some special key value.
  • The elements that are inserted into the Dictionary will have the same data type. This means, in any case, there can be all integers or all string values can be stored.
  • The key-value pairs of the Dictionary will also have the same data type with each other. This means, in any case, there can be all integers or all string values can be stored.
  • To implement Dictionary in C++ programming language, there is a need to insert a special header file into the C++ programming language. We will learn more about it in the next topic.
  • There is a need to use a loop every time to access all the data & the key values of the Dictionary in C++ programming language.

 

Conclusion:

 

As we saw, it is very important to find out the C++ Dictionary. It is a very important topic that will be necessary in the future to solve difficult problems. 

We need to remember those highlights related to the Dictionary in C++ programming language. It will help to memorize the process more easily. 

There is a need to clear the basis of the C++ programming language to get this topic more easily. There is a need to start this topic from scratch to better understand it. We need to remember that there is no concept of a Dictionary present in the C++ Programming Language. It is the concept that will help us in the future.

So, hope you have liked this piece of article. Share your thoughts in the comments section and let us know if we can improve more.

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