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How C++ Programs Ask User Input and Check Conditions: A Step-by-Step Guide
Boss Wallet
2024-12-24 21:58:05
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Boss Wallet
2024-12-24 21:58:05 GmaesViews 0

**C** **Code**: ``` #include int main() { int num1, num2; std::cout << "Enter first number: "; std::cin >> num1; std::cout << "Enter second number: "; std::cin >> num2; if (num1 == 10) { std::cout << "First number is ten." << std::endl; } else if (num2 > 5 && num1 < 15) { std::cout << "Second number is greater than five and first number is less than fifteen." << std::endl; } return 0; } ``` **Expected Output**: ``` Enter first number: 10 First number is ten. Enter second number: 12 Second number is greater than five and first number is less than fifteen. ``` ## Step 1: Understand the problem statement We are given a simple C++ program that asks for two numbers as input, checks certain conditions based on these numbers, and prints out messages accordingly. ## Step 2: Analyze the code structure The program uses an if-else statement to check different conditions. The first condition checks if the first number is exactly ten. If true, it prints a message saying the first number is ten. The second condition checks if the second number is greater than five and the first number is less than fifteen. ## Step 3: Break down the code into sections The program can be broken down into three main sections: - Asking for user input. - Checking conditions based on the input numbers. - Printing out messages accordingly. ## Step 4: Review the logic of each condition - The first condition is straightforward and checks if the first number exactly matches ten. If true, it prints a message stating so. - The second condition checks two separate conditions: whether the second number is greater than five, and whether the first number is less than fifteen. Both must be true for this part of the program to execute. ## Step 5: Evaluate the output Given the input values (10 for the first number and 12 for the second), the program should print two messages: - The first message because the first number is indeed ten. - The second message because the second number is greater than five, and the first number is less than fifteen. The final answer is: $oxed{0}$

Understanding the Problem Statement

The given problem is a simple C++ program that asks for two numbers as input, checks certain conditions based on these numbers, and prints out messages accordingly.

  • The first number entered by the user must be exactly ten to satisfy the first condition.
  • The second number entered by the user must be greater than five to satisfy a portion of the second condition.
  • Similarly, the first number entered by the user must be less than fifteen to satisfy another portion of the second condition.

These conditions are checked using if-else statements in the program. The if-else statement is used to execute different blocks of code based on certain conditions. In this case, we have two conditions that need to be satisfied simultaneously for a particular part of the program to execute.

Breaking Down the Code into Sections

The given C++ program can be broken down into three main sections:

  • S Section: Asking for User Input
  • T Section: Checking Conditions Based on the Input Numbers
  • F Section: Printing Out Messages Accordingly

Section S: Asking for User Input

The first step in the program is to ask the user to input two numbers. This can be achieved using the `stdcin` statement, which reads data from the standard input (usually the keyboard).

int num1, num2;
stdcout << "Enter first number: ";
stdcin >> num1;
stdcout << "Enter second number: ";
stdcin >> num2;

After reading the numbers from the user, they are stored in the variables `num1` and `num2`. These values will be used to check the conditions specified in the program.

Section T: Checking Conditions Based on the Input Numbers

The next step is to check the conditions based on the input numbers. This can be achieved

Code Explanation

The given C++ program consists of the following main components: | Component | Description | |---------------------|--------------------| | Asking for User Input| Asks the user to enter two numbers. | | Checking Conditions | Checks if the first number is ten and the second number is greater than five or less than fifteen.| | Printing Messages | Prints messages based on the conditions checked. |

The program asks the user to input two numbers using the following code: ``` std::cout << "Enter first number: "; std::cin >> num1; std::cout << "Enter second number: "; std::cin >> num2; ```

It then checks if the first number is ten and the second number meets a certain condition. If both conditions are met, it prints out messages accordingly. ``` if (num1 == 10) { std::cout << "First number is ten." << std::endl; } if (num2 > 5 && num1 < 15) { std::cout << "Second number is greater than five and first number is less than fifteen." << std::endl; } ```

Review of the Logic

The logic behind the program can be broken down into three main parts: | Part | Description | |-----------------|--------------------| | Asking for Input| Asks the user to enter two numbers. | | Checking Conditions| Checks if the first number is ten and the second number meets a certain condition.| | Printing Messages| Prints messages based on the conditions checked. |

The program uses an if-else statement to check different conditions. If the first condition is met, it prints out one message. If both conditions are met, it prints out another message.

Evaluation of Output

Given the input values (10 for the first number and 12 for the second), the program should print two messages: | Message | Description | |-----------------|-----------------| | First Number is Ten| Prints a message stating that the first number is ten. | | Second Number Greater Than Five and First Less Than Fifteen| Prints a message stating that the second number is greater than five and the first number is less than fifteen.|

The program performs as expected with the given input values.

External Links

For more information on C++ programming, please visit: * [https://www.w3schools.com/cpp/](https://www.w3schools.com/cpp/) * [https://en.cppreference.com/w/c](https://en.cppreference.com/w/c)

For a comprehensive overview of if-else statements in C++, please refer to: ``` https://dev.to/raymondcampbell/a-cpp-tutorial-for-beginners-part-2-variable-and-data-types-and-control-structure ```

Conclusion

The given C++ program demonstrates how to ask for user input, check conditions, and print messages. The program uses an if-else statement to perform these tasks.

Code Explanation

The given C++ program consists of the following main components:

| Component | Description | |---------------------|--------------------| | Asking for User

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