Write the following mathematical expression in C++. a. z = Vx? + y² + ]x – y| b. a = k + N-1 N

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
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6. A) write the following expression in C++.

B) Write equivalent expressions for each of the following by using De Morgan’s Law

  • !(x < 5)
  • !(x < 5) && !(y >= 7)
  • !(a == b)

 

 

To write the following mathematical expressions in C++, you can translate them into code as follows:

a. Expression: 
\[ z = \sqrt{x^2 + y^2} + |x - y| \]

C++ Code:
```cpp
#include <cmath> // For mathematical functions
#include <cstdlib> // For abs()

double z = sqrt(pow(x, 2) + pow(y, 2)) + abs(x - y);
```

b. Expression:
\[ a = k \left( \frac{1}{N} + \sqrt{N - 1} \right)^{\frac{1}{3}} \]

C++ Code:
```cpp
#include <cmath> // For mathematical functions

double a = k * pow((1.0 / N) + sqrt(N - 1), 1.0 / 3);
```

### Explanation:

- The `sqrt` function is used to find the square root.
- The `pow` function is used to raise a number to a power.
- The `abs` function computes the absolute value of an integer in C++. If dealing with floating-point numbers, `fabs` from `<cmath>` should be used.
- Constants like `k` or variables like `x`, `y`, `N` need to be defined and initialized elsewhere in your actual program.
Transcribed Image Text:To write the following mathematical expressions in C++, you can translate them into code as follows: a. Expression: \[ z = \sqrt{x^2 + y^2} + |x - y| \] C++ Code: ```cpp #include <cmath> // For mathematical functions #include <cstdlib> // For abs() double z = sqrt(pow(x, 2) + pow(y, 2)) + abs(x - y); ``` b. Expression: \[ a = k \left( \frac{1}{N} + \sqrt{N - 1} \right)^{\frac{1}{3}} \] C++ Code: ```cpp #include <cmath> // For mathematical functions double a = k * pow((1.0 / N) + sqrt(N - 1), 1.0 / 3); ``` ### Explanation: - The `sqrt` function is used to find the square root. - The `pow` function is used to raise a number to a power. - The `abs` function computes the absolute value of an integer in C++. If dealing with floating-point numbers, `fabs` from `<cmath>` should be used. - Constants like `k` or variables like `x`, `y`, `N` need to be defined and initialized elsewhere in your actual program.
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