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I need help with these, C Programming

I need help with these, C Programming

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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I need help with these, C Programming.

### 3.12.2: Bool in branching statements **Challenge Activity** Write an if-else statement to describe an integer. Print "Positive even number" if `isEven` and `isPositive` are both true. Print "Positive number" if `isEven` is false and `isPositive` is true. Print "Not a positive number" otherwise. End with newline. #### Learn how our autograder works Here's the code snippet provided for the activity: ```c #include <stdio.h> #include <stdbool.h> int main(void) { int userNum; bool isPositive; bool isEven; scanf("%d", &userNum); isPositive = (userNum > 0); isEven = ((userNum % 2) == 0); /* Your solution goes here */ return 0; } ``` ### Explanation: 1. **Include Libraries:** - `#include <stdio.h>`: Includes the standard input-output library for using `scanf` and `printf`. - `#include <stdbool.h>`: Includes the boolean data type (bool) and constants `true` and `false`. 2. **Main Function:** - `int main(void)`: Defines the main function of the program. 3. **Variable Declarations:** - `int userNum;`: An integer variable to store the user's input number. - `bool isPositive;`: A boolean variable to indicate if the number is positive. - `bool isEven;`: A boolean variable to indicate if the number is even. 4. **Input Reading:** - `scanf("%d", &userNum);`: Reads an integer from the user and stores it in `userNum`. 5. **Boolean Evaluations:** - `isPositive = (userNum > 0);`: Evaluates if `userNum` is greater than 0. - `isEven = ((userNum % 2) == 0);`: Evaluates if `userNum` is evenly divisible by 2 (i.e., is an even number). 6. **Your Solution Goes Here:** Insert an if-else statement to print the correct message based on the values of `isPositive` and `isEven`. Example Solution: ```c if (isEven && isPositive) { printf("Positive even number\n");
Transcribed Image Text:### 3.12.2: Bool in branching statements **Challenge Activity** Write an if-else statement to describe an integer. Print "Positive even number" if `isEven` and `isPositive` are both true. Print "Positive number" if `isEven` is false and `isPositive` is true. Print "Not a positive number" otherwise. End with newline. #### Learn how our autograder works Here's the code snippet provided for the activity: ```c #include <stdio.h> #include <stdbool.h> int main(void) { int userNum; bool isPositive; bool isEven; scanf("%d", &userNum); isPositive = (userNum > 0); isEven = ((userNum % 2) == 0); /* Your solution goes here */ return 0; } ``` ### Explanation: 1. **Include Libraries:** - `#include <stdio.h>`: Includes the standard input-output library for using `scanf` and `printf`. - `#include <stdbool.h>`: Includes the boolean data type (bool) and constants `true` and `false`. 2. **Main Function:** - `int main(void)`: Defines the main function of the program. 3. **Variable Declarations:** - `int userNum;`: An integer variable to store the user's input number. - `bool isPositive;`: A boolean variable to indicate if the number is positive. - `bool isEven;`: A boolean variable to indicate if the number is even. 4. **Input Reading:** - `scanf("%d", &userNum);`: Reads an integer from the user and stores it in `userNum`. 5. **Boolean Evaluations:** - `isPositive = (userNum > 0);`: Evaluates if `userNum` is greater than 0. - `isEven = ((userNum % 2) == 0);`: Evaluates if `userNum` is evenly divisible by 2 (i.e., is an even number). 6. **Your Solution Goes Here:** Insert an if-else statement to print the correct message based on the values of `isPositive` and `isEven`. Example Solution: ```c if (isEven && isPositive) { printf("Positive even number\n");
### Section 3.12: Boolean Data Type #### 3.12.1: Using Bool **Challenge Activity** **Problem Statement:** Assign `isTeenager` with `true` if `kidAge` is 13 to 19 inclusive. Otherwise, assign `isTeenager` with `false`. **Detailed Explanation:** ```c #include <stdio.h> #include <stdbool.h> int main(void) { bool isTeenager; int kidAge; scanf("%d", &kidAge); if (kidAge>=13 && kidAge<=19) { isTeenager=true; } else { isTeenager=false; } if (isTeenager) { printf("Teen"); } else { printf("Not teen"); } return 0; } ``` **Issues in the Code:** There are compilation errors in the code: 1. **Error at line 13: `else` without a previous `if`** - The first 'else if' is not needed because it's supposed to pair with a preceding 'if.' - Correct it by just using `else`. 2. **Error at line 13 & 14: expected `(` before `isTeenager=false;`** - There is an error in syntax. Correct the structure of `else` to avoid this error. **Corrected Code:** ```c #include <stdio.h> #include <stdbool.h> int main(void) { bool isTeenager; int kidAge; scanf("%d", &kidAge); if (kidAge>=13 && kidAge<=19) { isTeenager=true; } else { isTeenager=false; } if (isTeenager) { printf("Teen"); } else { printf("Not teen"); } return 0; } ``` **Explanation of the Logic:** 1. **Initialization:** - A boolean variable `isTeenager` and an integer variable `kidAge` are declared. 2. **Reading Input:** - `scanf` is used to read an integer value for `kidAge`. 3. **Conditional Check:** - If `kidAge` is between 13 and 19 (inclusive), `isTeenager` is set to `true`. - Otherwise, `isTeenager`
Transcribed Image Text:### Section 3.12: Boolean Data Type #### 3.12.1: Using Bool **Challenge Activity** **Problem Statement:** Assign `isTeenager` with `true` if `kidAge` is 13 to 19 inclusive. Otherwise, assign `isTeenager` with `false`. **Detailed Explanation:** ```c #include <stdio.h> #include <stdbool.h> int main(void) { bool isTeenager; int kidAge; scanf("%d", &kidAge); if (kidAge>=13 && kidAge<=19) { isTeenager=true; } else { isTeenager=false; } if (isTeenager) { printf("Teen"); } else { printf("Not teen"); } return 0; } ``` **Issues in the Code:** There are compilation errors in the code: 1. **Error at line 13: `else` without a previous `if`** - The first 'else if' is not needed because it's supposed to pair with a preceding 'if.' - Correct it by just using `else`. 2. **Error at line 13 & 14: expected `(` before `isTeenager=false;`** - There is an error in syntax. Correct the structure of `else` to avoid this error. **Corrected Code:** ```c #include <stdio.h> #include <stdbool.h> int main(void) { bool isTeenager; int kidAge; scanf("%d", &kidAge); if (kidAge>=13 && kidAge<=19) { isTeenager=true; } else { isTeenager=false; } if (isTeenager) { printf("Teen"); } else { printf("Not teen"); } return 0; } ``` **Explanation of the Logic:** 1. **Initialization:** - A boolean variable `isTeenager` and an integer variable `kidAge` are declared. 2. **Reading Input:** - `scanf` is used to read an integer value for `kidAge`. 3. **Conditional Check:** - If `kidAge` is between 13 and 19 (inclusive), `isTeenager` is set to `true`. - Otherwise, `isTeenager`
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