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Stringstream in C++
Here we will see the string stream in C++. The string stream associates a string object with a string. Using this we can read from string as if it were a stream like cin.
The Stringstream has different methods. These are like below −
clear(): Used to clear the stream
str(): To get and set the string object whose content is present in stream
operator << : This will add one string into the stringstream
operator >> : This is used to read from stringstream object.
Let us see two examples of string streams. In the first program we will divide the words into separate strings.
Example
#include <iostream>
#include <vector>
#include <string>
#include <sstream>
using namespace std;
int main() {
string str("Hello from the dark side");
string tmp; // A string to store the word on each iteration.
stringstream str_strm(str);
vector<string> words; // Create vector to hold our words
while (str_strm >> tmp) {
// Provide proper checks here for tmp like if empty
// Also strip down symbols like !, ., ?, etc.
// Finally push it.
words.push_back(tmp);
}
for(int i = 0; i<words.size(); i++)
cout << words[i] << endl;
}Output
Hello from the dark side
Here we will convert Decimal to Hexadecimal using string stream.
Example
#include<iostream>
#include<sstream>
using namespace std;
main(){
int decimal = 61;
stringstream my_ss;
my_ss << hex << decimal;
string res = my_ss.str();
cout << "The hexadecimal value of 61 is: " << res;
}Output
The hexadecimal value of 61 is: 3d
Updated on: 30-Jul-2019
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