Here I am trying to solve my problem using maps technique.

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i just started with maps.this is the code i tried to implement.when i take input for string.it keeps taking input but doesn't output the code.how can i modify this code so that i can get my required result.

What I have tried:

C++

#include<iostream>
#include<conio.h>
#include
#include<string>
#include<iterator>

using namespace std;

int main()
{
        map<string, int> stringCounts;
	string str;

	while (getline(cin, str)) 
          stringCounts[str]++;

	map<string, int>::iterator iter;
	for (iter = stringCounts.begin(); iter != stringCounts.end(); iter++)
	{
	cout << "word: " << iter->first << ", count: " << iter->second << endl;
	}
	_getch();
}

Posted 24-Apr-18 5:19am

Member 13784265

Updated 24-Apr-18 5:36am

CPallini

v2

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Richard MacCutchan 24-Apr-18 11:45am

You need to tell it when there is no more input. Use ^Z at the console, or test for some special string.

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CPallini · Answer 1 · 2018-04-24T05:38:00

Actually your code (or a compiling version of it) works.

C++

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

using namespace std;

int main()
{
  map<string, int> stringCounts;
  string str;

  while (getline(cin, str))
    stringCounts[str]++;

  map<string, int>::iterator iter;
  for (iter = stringCounts.begin(); iter != stringCounts.end(); iter++)
  {
    cout << "word: " << iter->first << ", count: " << iter->second << endl;
  }
}

sample input:

as
asas
asas
aa

output

word: aa, count: 1
word: as, count: 1
word: asas, count: 2

[update]
The same program written using modern C++:

#include <iostream>
#include <map>

using namespace std;

int main()
{
  map<string, int> stringCounts;
  string str;

  while (getline(cin, str))
    stringCounts[str]++;

  for (auto p : stringCounts)
    cout << "word: " << p.first << ", count: " << p.second << endl;
}

[/update]