map in cpp

#include <iostream>
#include <string>
#include <map>

using std::string;
using std::map;

int main() {
	// A new map
  	map<string, int> myMap = { // This equals sign is optional
		{"one", 1},
    	{"two", 2},
    	{"three", 3}
  	};

  	// Print map contents with a range-based for loop
    // (works in C++11 or higher)
  	for (auto& iter: myMap) {
    	std::cout << iter.first << ": " << iter.second << std::endl;  
  	}
}

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4.1

Tachomi 75 points

                                    #include &lt;bits/stdc++.h&gt;
#include &lt;iostream&gt;
#include &lt;map&gt;
using namespace std;
void mapDemo(){
	map&lt;int, int&gt; A;
	A[1] = 100;
	A[2] = -1;
	A[3] = 200;
	A[100000232] = 1;
	//to find the value of a key
	//A.find(key)
	
	//to delete the key
	//A.erase(key)
	
	map&lt;char, int&gt; cnt;
	string x = &quot;Sumant Tirkey&quot;;
	
	for(char c:x){
		cnt[c]++;//map the individual character with it's occurance_Xtimes
	}
	
	//see  how many times a and z occures in my name
	cout&lt;&lt; cnt['a']&lt;&lt;&quot; &quot;&lt;&lt;cnt['z']&lt;&lt;endl;
	
} 
	
int main() {
	mapDemo();
	return 0;
}

Thank you! 10

4.1 (10 Votes)

4.6

Francois Nel 110 points

                                    #include&lt;bits/stdc++.h&gt;
using namespace std;

int main()
{
  map&lt;string,int&gt;mapa;
  for(int i=0;i&lt;10;i++){
    int x;
    string s;
    cin&gt;&gt;x&gt;&gt;s;
    mapa.insert({s,x});
    }
  for(auto [x,y]:mapa){
    cout&lt;&lt;x&lt;&lt;&quot; &quot;&lt;&lt;y&lt;&lt;'\n';
  }
}

Thank you! 5

4.6 (5 Votes)

4.38

Shibamon 90 points

                                    //Since c++17
for (auto&amp; [key, value]: myMap) {
    cout &lt;&lt; key &lt;&lt; &quot; has value &quot; &lt;&lt; value &lt;&lt; endl;
}
//Since c++11
for (auto&amp; kv : myMap) {
    cout &lt;&lt; kv.first &lt;&lt; &quot; has value &quot; &lt;&lt; kv.second &lt;&lt; endl;
}

Thank you! 8

4.38 (8 Votes)

3.83

Robert Astle 115 points

                                    #include &lt;map&gt;

int main(){
  //new map
  std::map &lt;int,int&gt; myMap;
  myMap[0] = 1;
  myMap[1] = 2;
  myMap[2] = 3;
  myMap[3] = 4;
}

Thank you! 6

3.83 (6 Votes)

Momo 110 points

                                    #include &lt;map&gt;

// empty map container 
map&lt;int, int&gt; gquiz1; 
  
// insert elements in random order 
gquiz1.insert(pair&lt;int, int&gt;(1, 40));

Thank you! 4

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map in cpp

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