Stringstream class

#1

pls explain the concept of stringstream class in c++.
thnks

#2

A stringstream associates a string object with a stream
means if you write
stringstream name(string);
now name is a stream(like input stream) you can take input from this stream

stringstream class is extremely useful in parsing input.

#3

pls explain with an example

#4

for ex you want to count no of words in given string
string str;
getline(cin,str);

stringstream ss(str);
`int` `count = 0; `

while (s >> word)

count++;

return count;

Application
conversion of string to num
string str;
cin>>str;
stringstream ss(str);
int num;
ss>>num;

num stores no which is in str
#5

pls explain working of the while loop,
especially working of >>
thanks

#6

similar to cin>>
now as our stream is ss so we are taking input from (ss>>word)
when input is complete it will throw null and ( as null is consider as false statement) so we come out of loop

#7

how it will count individual words?.
thnks

#8

as cin take only one word at a time so when word is taken it increase count

#9

how it will know it has taken one word?

#10

as cin doesn’t take whitespaces so it will stop taking input

you can try it
string str;
cin>>str;
cout<<str;
in input provide " full name"
output will be only full