Multidimensional Arrays in C++
A built-in multidimensional array in C++ is an array whose elements are themselves arrays.
Summary
A built-in multidimensional array in C++ is an array whose elements are themselves arrays. Dimensions are fixed at compile time, and elements occupy contiguous memory in row-major order. For example, int grid[3][4]; declares three rows, each containing four integers.
Each subscript selects one nesting level: grid[r][c] selects a column within a row. The rightmost index varies fastest in memory. The element offset is , where is the column count. Valid indices satisfy and .
🧠 Key Concepts
- Arrays of arrays
- Row-major layout
- Nested initialization
- Zero-initialization
- Nested loop traversal
- Array bounds
- Array-to-pointer conversion
- Runtime-sized storage
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Multidimensional Arrays in C++
📘 Overview A built-in multidimensional array in C++ is an array whose elements are themselves arrays. Its dimensions are fixed at compile time, and its elements occupy contiguous memory in row-major order.
🧠 Key Idea Each subscript selects an element at one nesting level: grid[r][c] selects column c within row r. The rightmost index varies fastest in memory.
⚔️ Core Details: - Declaration: int grid[3][4]; creates three rows of four integers each. - Initialization: int grid[2][3] = {{1, 2, 3}, {4, 5, 6}}; initializes each row using a nested initializer list. - Zero-initialization: int grid[3][4]{}; initializes every integer element to zero. - Traversal: nested loops conventionally use an outer row loop and an inner column loop. - Row-major layout: the element offset is , where is the zero-based row index,
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