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Chapter 3: Problem 40

include #include using namespace std; int main() { const in SIZE = 20; char userInput[SIZE]; cout <… # (Assume the user enters George Washington.) #include #include using namespace std; int main() { const in SIZE = 20; char userInput[SIZE]; cout << "What is your name? "; cin >> setw(SIZE) >> userInput; cout << "Hello " << userInput << endl; return 0; }

Short Answer

Expert verified
Answer: The code declares a char array named "userInput" to store user input. It then prompts the user for their name using the "cout" object. The user's input is stored using the "cin" object and the setw(SIZE) function to limit the maximum number of characters to read and store in the "userInput" array. The output is printed by using the "cout" object to display the greeting message "Hello " followed by the user's input, "userInput", and inserting a new line with "endl".

Step by step solution

01

Include Libraries

Start by including the necessary libraries: for input and output streaming and for formatting input/output (e.g., setw).
02

Declare the Namespace

Declare the namespace "std" to avoid typing "std::" every time a function or object from the C++ Standard Library is used.
03

Begin the Main Function

Begin the main function, where the code will be executed.
04

Declare Variables

Declare a constant integer variable "SIZE" to denote the maximum size of the input string (20 characters). Then, declare a char array named "userInput" with the size of SIZE to store user input.
05

Prompt User for Input

Request the user's name using the "cout" object to print the prompt on the screen: "What is your name? ".
06

Store User Input

Use the "cin" object to get the user's input. Use setw(SIZE) to limit the maximum number of characters (equal to SIZE) to read from the input and store it in the "userInput" array.
07

Print the Output

Use the "cout" object to print the greeting message "Hello " followed by the user's input, "userInput". Use "endl" to insert a new line.
08

Return 0 and Close the Main Function

Return 0 to indicate a successful program execution and close the main function.

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Most popular questions from this chapter

Write \(\mathrm{C}++\) expressions for the following algebraic expressions: \\[ \begin{array}{l} a=12 x \\ z=5 x+14 y+6 k \\ y=x^{4} \\ g=\frac{b+12}{4 k} \\ c=\frac{a^{3}}{b^{2} k^{4}} \end{array} \\]

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