Whitespaces are not being read

Question

#include <iostream>
#include <string>
#include <vector>
using namespace std;

int main()
{
    int vovles_count[5] = { 0,0,0,0,0 };
    char vovwls[5] = { 'a','e','i','o','u' };
    char vov;
    int nonVov = 0 , punt = 0 , douseq = 0;

    //std::cin >> std::noskipws; //tells not to skip white spaces

    while (cin >> vov)
    {
        switch (vov)
        {
            case 'a':
                ++vovles_count[0];
                break;
            case 'e':
                ++vovles_count[1];
                break;
            case 'i':
                ++vovles_count[2];
                break;
            case 'o':
                ++vovles_count[3];
                break;
            case 'u':
                ++vovles_count[4];
                break;
            case ' ':
                ++punt;
                break;
            case '\n':
                ++punt;
                break;
            case 'f':
                cin >> vov;
                if (vov == 'l' || vov == 'f')
                {
                    ++douseq;
                    ++nonVov; //previous f
                    ++nonVov; //current f

                } 
                else if (vov == 'i')
                {
                    ++vovles_count[2];
                    ++douseq;
                    ++nonVov;   //previous f
                }
                else if (vov == ' ' || vov == '\n')
                    ++punt;

                break;
            default:
                ++nonVov;
                break;

        }
    }
    for (int i = 0; i < 5; ++i)
    {
        cout << vovwls[i] << " occured for " << vovles_count[i] << "times" << '\n';
    }
    cout << '\n' << nonVov << " are the occurence of non vovels " << '\n' ;
    cout << '\n' << punt << " are the occurence of whitespaces " << '\n';
    cout << '\n' << douseq << " are the occurence of double sequence " << '\n';


    system("pause");
    return 0;
  }

I dont think i see any problem in the code but i don't know why white spaces are not being read?

@πάνταῥεῖ you mean cin does not read whitespaces? How do i modify the code?and btw that's a wonderful meaning for the name! — psrag anvesh, Mar 26 '16 at 09:48
`std::getline(std::cin, a_string)` (with `a_string` a `std::string` from the header ``) will read one line of input from `std::cin`. That string will contain the entered spaces. — Peter, Mar 26 '16 at 09:52
@psraganvesh You can for instance use `cin.read()` to read a certain number of characters including whitespace and newline characters. — πάντα ῥεῖ, Mar 26 '16 at 09:52
That's another way, but also affects extraction of things other than characters in ways that can be counter-intuitive. — Peter, Mar 26 '16 at 09:58
@Peter what if i use noskipws before the while loop and after it use skipws will it later ignore? — psrag anvesh, Mar 26 '16 at 10:00
skipws is an enduring setting. That's part of the problem - particularly if other code expects a stream behaving as it does by default. — Peter, Mar 26 '16 at 10:05

reza · Answer 1 · 2016-03-26T09:53:39.277

0

using cin will skip white space by default. you can try other ways:

cin.get();

exactly this code overload of function would help you:

istream& get (char* s, streamsize n, char delim);

put '\n' in delim to end input line on pushing enter

edited Mar 26 '16 at 09:53

answered Mar 26 '16 at 09:50

reza

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`getch()` and `getche()` are not standard C++. They are vendor-specific extensions. – Peter Mar 26 '16 at 09:52
when i use cin.get() im getting the errors saying cout is ambiguous i don't know what that means? – psrag anvesh Mar 26 '16 at 10:10
so you can use [this link](http://stackoverflow.com/a/25538593/6116686) @psraganvesh – reza Mar 26 '16 at 13:31

Whitespaces are not being read

1 Answers1