Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.Learn Challenge: Array Pointer Arithmetic Practice | Pointer Arithmetic
C++ Pointers and References

bookChallenge: Array Pointer Arithmetic Practice

Access the row
Access the column
*arr
**arr
*(arr + row)
**(arr + column)
Task

Swipe to start coding

In real-world applications like weather stations, industrial sensors, or scientific experiments, data is often stored in a 2D grid, where each element represents a measurement.

In this task, you will implement a function that finds the maximum temperature using pointer-to-pointer syntax, which helps you understand how 2D arrays are stored in memory and how to navigate them with pointers.

  1. Declare a variable maxTemp to store the maximum temperature.
  2. Initialize maxTemp with the value of the first element of the array using pointer syntax.
  3. For each element, access it using pointer syntax: *(*(arr + i) + j).
  4. Compare the accessed element with maxTemp.
  5. If the element is greater than maxTemp, update maxTemp with this new value.
  6. After all elements are processed, return maxTemp as the maximum temperature found in the grid.

Solution

solution.cpp

solution.cpp

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 2. ChapterΒ 4
single

single

Ask AI

expand

Ask AI

ChatGPT

Ask anything or try one of the suggested questions to begin our chat

Suggested prompts:

Can you explain what `*arr` and `**arr` mean in this context?

How do I use these pointer notations to access elements in a 2D array?

Can you provide an example of accessing a specific element using these methods?

close

Awesome!

Completion rate improved to 5.88

bookChallenge: Array Pointer Arithmetic Practice

Swipe to show menu

Access the row
Access the column
*arr
**arr
*(arr + row)
**(arr + column)
Task

Swipe to start coding

In real-world applications like weather stations, industrial sensors, or scientific experiments, data is often stored in a 2D grid, where each element represents a measurement.

In this task, you will implement a function that finds the maximum temperature using pointer-to-pointer syntax, which helps you understand how 2D arrays are stored in memory and how to navigate them with pointers.

  1. Declare a variable maxTemp to store the maximum temperature.
  2. Initialize maxTemp with the value of the first element of the array using pointer syntax.
  3. For each element, access it using pointer syntax: *(*(arr + i) + j).
  4. Compare the accessed element with maxTemp.
  5. If the element is greater than maxTemp, update maxTemp with this new value.
  6. After all elements are processed, return maxTemp as the maximum temperature found in the grid.

Solution

solution.cpp

solution.cpp

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 2. ChapterΒ 4
single

single

some-alt