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Write a program that uses the map template class to compute a histogram of positive numbers entered by the user. The map’s key should be the number that is entered, and the value should be a counter of the number of times the key has been entered so far. Use –1 as a sentinel value to signal the end of user input.512355321-1Then the program should output the followings:The number 3 occurs 2 timesThe number 5 occurs 3 timesThe number 12 occurs 1 timesThe

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kendrich

Answer:

See explaination

Explanation:

#include <iostream>

#include <map>

#include <string>

#include <algorithm>

#include <cstdlib>

#include <iomanip>

using namespace std;

int main()

{

map<int, int> histogram;

int a=0;

while(a>=0)

{

cout << " enter value of a" ;

cin >>a;

histogram[a]++;

}

map<int,int>::iterator it;

for ( it=histogram.begin() ; it != histogram.end(); it++ )

{

cout << (*it).first << " occurs " << setw(3) << (*it).second << (((*it).second == 1) ? " time." : " times.") <<endl;

}

return 0;

}

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