String Operations in C++

              Strings are a special kind of objects in std::string class. It is a collection of characters in a common name.

Features:

• The manipulation is easy. You can access, concatenate strings, extract a substring and compare them quickly.
• It has many built-in functions.
• You can add or remove characters according to the user need. It adopt it effectively.

How to create and manipulate Strings?

First, include header file #include<string>

Next, declare a string as follows..

Syntax:

‘string str;’

Where string is the keyword to represent string.

‘str’ is the variable.

Eg:

‘string a;’

C++ Program to print string:

#include <iostream>

#include <string>

using namespace std;

int main() {

    string a="Welcome to C++";

    cout<<a;

    return 0;

}

Output:

Welcome to C++

The operations of strings are given below.

• ·       Accessing of an element.
• ·       Concatenating strings
• ·       Length of string
• ·       Modification of  string
• ·       Substring extraction
• ·       Searching an element

Accessing of an element:

              It accesses the element in the string.

C++ Program:

#include <iostream>

#include <string>

using namespace std;

int main() {

   string str = "Welcome to the world of C++";

   cout<<str<<endl;

   cout << "First character: " << str[0] << endl;

   cout << "Sixth character: " << str[6] << endl;

   cout << "Character at index 10: " << str.at(10) << endl;

    return 0;

}

Output:

Welcome to the world of C++

First character: W

Sixth character: e

Character at index 9: o

Strings in C++

Concatenating strings:

              Two strings are joined together here.

C++ program:

#include <iostream>

#include <string>

using namespace std;

int main() {

    string st1 = "C++";

    string st2 = " Programming";

    string cat = st1 + st2;

    cout << "Concatenation of two strings are : " << cat << endl;

    string res1 = st1;

    res1.append(st2);

    cout << "Concatenation of two strings using append() functions: " << res1 << endl;

    return 0;

}

Output:

Concatenation of two strings are : C++ Programming

Concatenation of two strings using append() functions: C++ Programming

These are the basic operations of Strings in c++ programming was explained. Part2 is explained in next post.