Question

a. Write a function arrayToMap that takes an array of strings and returns a std::map<int, string> such that the values in the map are the string values in the array of strings, and the keys in the map are the corresponding array indices of the string values. You may assume all necessary libraries have been included in your program and your solution must be syntactically correct in order to receive full credit. map<int, string> arrayToMap(string arr[], int arrSize) { b. Write a function printMap that takes a std::map<int, string> and prints each key / value pair in the form of key:value (one pair per line). Your solution must use iterators to traverse the map and access the values. You may assume all necessary libraries have been included in your program and your solution must be syntactically correct in order to receive full credit. void printMap(map<int, string> x) {

Answer 1

a.

map<int,string> arrayToMap(string arr[],int arrSize)

{

map<int,string> x;

for(int i=0;i<arrSize;i++)

x[i]=arr[i];

return x;

}

b.

void printMap(map<int,string> x)

{

map<int,string>::iterator i;

for(i=x.begin();i!=x.end();i++)

cout << i->first << ":" << i->second << endl;

}

CODE TO VERIFY:

#include <iostream>

#include <map>

#include <iterator>

using namespace std;

//to store array indices as key and corresponding string as value in map and return it

map<int,string> arrayToMap(string arr[],int arrSize)

{

map<int,string> x;

for(int i=0;i<arrSize;i++)

x[i]=arr[i];

return x;

}

//to print the map in the form of key:value using iterator

void printMap(map<int,string> x)

{

map<int,string>::iterator i;

for(i=x.begin();i!=x.end();i++)

cout << i->first << ":" << i->second << endl;

}

int main()

{

//testing the function

string arr[5]={"Debjit","Ganguli","Is","the","best"};

map<int,string> x=arrayToMap(arr,5);

printMap(x);

}

Output:

0:Debjit 1:Ganguli 2:13 3: the 4:best