Strings and stringstream

std::string operations, safe input, splitting text and converting numbers.

11 min read · Lesson 6 of 6 · Pro

std::string is a vector of characters that knows its length

Everything painful about C strings — the null terminator, strcpy overflows, sizing the array — is handled for you.

C++

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

int main() {
    string a = "first";
    string b = "hack";

    string c = a + b;              // concatenation
    c += "!";                      // append

    cout << c << "\n";             // firsthack!
    cout << c.length() << "\n";    // 10  (size() is identical)
    cout << c[0] << c.back() << "\n";  // f!

The rest of this lesson is Pro

The free lessons of C++ and STL Essentials finish what they start — read those first if you have not. This one goes further, and it is part of the paid half.

A pass opens the paid lessons of every course, the mock test papers and the company-wise series. It ends on its own date; nothing renews by itself.

Get a pass — from ₹29 for 7 days

Already bought one? Log in.