Chapter 7: Problem 77

T F Two-dimensional arrays may be passed to functions, but the row size must be specified in the definition of the parameter variable.

Short Answer

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**Answer:** The row size must be specified when passing a two-dimensional array to a function because the compiler needs to know the size of each row in order to access the array elements correctly. Without specifying the row size, the compiler will not be able to determine the layout of the array in memory, and it may fail to read the subsequent rows of the array correctly.

Step by step solution

1. Understanding two-dimensional arrays

Two-dimensional arrays are arrays of arrays, with elements arranged in rows and columns. They are used to store data in table-like structures. In C and C++ programming languages, two-dimensional arrays can be declared as follows: `int array[row_size][column_size];`.

2. Passing two-dimensional arrays to functions

To pass a two-dimensional array to a function, we can use a pointer to a pointer (for dynamic memory allocation) or a pointer to an array. Note that when passing a two-dimensional array to a function, the compiler needs to know the size of each row in order to access the array elements correctly.

3. Specifying the row size in the function parameter variable

In the function parameter variable, we need to specify the row size of the two-dimensional array. If we do not specify the row size, the compiler will not know how to access the subsequent rows of the array correctly. Here's an example of passing a two-dimensional array to a function: ```cpp #include using namespace std; // Function declaration with the row size specified in the parameter variable void printTwoDimensionalArray(int arr[][3], int rowSize){ for(int i=0; i<rowSize; i++){ for(int j=0; j<3; j++){ cout << arr[i][j] << " "; } cout << endl; } } int main(){ int twoDimensionalArray[][3] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } }; int rowSize = sizeof(twoDimensionalArray) / sizeof(twoDimensionalArray[0]); printTwoDimensionalArray(twoDimensionalArray, rowSize); return 0; } ``` In this example, the row size is specified in the function parameter variable (`int arr[][3]`) and the function `printTwoDimensionalArray` can correctly access the elements of the two-dimensional array.

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T F Two-dimensional arrays may be passed to functions, but the row size must be specified in the definition of the parameter variable.

Short Answer

Step by step solution

1. Understanding two-dimensional arrays

2. Passing two-dimensional arrays to functions

3. Specifying the row size in the function parameter variable

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