Practice Two-dimensional Arrays (1.6) - Chapter 10: Arrays and Strings

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9 questions

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6 sample questions

Question 1.
What is the declaration for a two-dimensional array with 3 rows and 4 columns?
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Think of the format data_type array_name[num_rows][num_columns];
Question 2.
How would you access the first element in a 2D array called 'data'?
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Remember, array indexing starts at 0.
3Question 3.
What will int matrix[2][3] = {{1, 2, 3}, {4, 5, 6}}; do?
- Declare a 2D array
- Initialize it with values
- Both A and B
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Consider both declaration and initialization parts.
4Question 4.
Can a two-dimensional array be accessed in a single index?
- True
- False
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Think about how index locations work in arrays.
Question 5.
Write a C++ program that calculates the average of all elements in a 3x3 matrix.
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Don’t forget to initialize your sum variable at 0!
Question 6.
Create a program that takes two 2D arrays, multiplies them, and outputs the resulting matrix.
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Ensure to remember the logic that only certain dimensions can be multiplied together.

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