Question

What is the output produced by the following code? string s1, s2("Hello"); s1 = s2; s2[0] = 'J'; cout << s1 << " " << s2;

Short answer

```cpp string s1, s2("Hello"); s1 = s2; s2[0] = 'J'; cout << s1 << " " << s2; ``` Answer: The output of the code will be 'Hello Jello'.

Step-by-step solution

Identify and analyze the code lines

We have four lines of code. We need to execute these lines step by step to understand the output. 1. string s1, s2("Hello"); This line initializes two strings - s1 and s2. s2 is initialized with the text 'Hello'. 2. s1 = s2; This command assigns the value of s2 to s1. 3. s2[0] = 'J'; This command changes the first character of s2 to 'J'. 4. cout << s1 << " " << s2; This line prints the values of s1 and s2.

Execute the first line of the code

string s1, s2("Hello"); In this step, we initialize two strings - s1 and s2. s2 is initialized with the value 'Hello'. So, we have: s1 = (empty string) s2 = 'Hello'

Execute the second line of the code

s1 = s2; In this step, we're assigning the value of s2 to s1. Now, both s1 and s2 have the same value: s1 = 'Hello' s2 = 'Hello'

Execute the third line of the code

s2[0] = 'J'; In this step, we're changing the first character of s2 to 'J'. Note that s1 remains unchanged. So, we have: s1 = 'Hello' s2 = 'Jello'

Execute the fourth line of the code and find the output

cout << s1 << " " << s2; In this step, we're printing the values of s1 and s2. Based on the previous steps, we have s1 = 'Hello' and s2 = 'Jello'. So the output will be: 'Hello Jello'