Question

I am using map to count the occurence of words. Here is the code.

#include <iostream>
#include <map>
#include <string>
using namespace std;
int main() {
    map<string,int>wordcount;
    string s;

    while (cin>> s && s!="red")
        ++wordcount[s];

    while (cin>>s &&  s!="red")

    cout << s << "   " << wordcount[s] << endl;
    return 0;
}

I start the program, type words and at the last line enter the word “red”, but it does not do anything. Then I type “red” the second time and it outputs:

press any key to continue

what is wrong?

Answer 1

Too groggy to write here, but I’ll try a second time. 🙂

If you write a lot of words, it will count them up until you write “red”.
The second loop will print the count for the words you input, but if you put “red” right away it will simply terminate the program without printing anything.

Try running the program with the following input:

one
two
two
red
zero
one
two
red