7.2. string variables

You can create a variable with type string in the usual ways.

In the active code below, the first line creates a string without giving it a value. The second line assigns it the string value "Hello,". The third line is a combined declaration and assignment, also called an initialization.

#include <iostream> using namespace std; int main() { string first; first = "Hello, "; string second = "world."; }

Normally when string values like "Hello, " or "world." appear, they are treated as C strings. In this case, when we assign them to an string variable, they are converted automatically to string values.

We can output strings in the usual way:

cout << first << second << endl;

In order to compile this code, you will have to include the header file for the string class, and you will have to add the file string to the list of files you want to compile. The details of how to do this depend on your programming environment.

Run the active code below!

#include <iostream> using namespace std; int main() { string first; first = "Hello, "; string second = "world."; cout << first << second << endl; }

Construct a block of code that correctly prints out a string variable.

        string x;

x = "It is cold outside!";

x = "It is cold outside" #paired

cout << x << endl;
        

Q-4: How would you initialize a string?

• string x = "Hello";
• This is the correct way to initialize a string.
• x = "Hello";
• This is an assignment.
• string x;
• This is a declaration.

Q-5: Click on each spot where a string assignment occurs.Remember, square brackets [] are used to access a character in a string.

def main() {
    string fruit;
    fruit = "apple";
    fruit = "pear";
    string flavor;
    flavor = "vanilla";
}

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