Chapter 7: Problem 46

Define a two-dimensional array of integers named grades. It should have 30 rows and 10 columns.

Short Answer

Expert verified

Answer: To declare a two-dimensional integer array named "grades" with 30 rows and 10 columns, use the syntax `int grades[30][10];`. To initialize the array with a specific value, such as 0, use nested loops: ```c for(int i = 0; i < 30; i++){ for(int j = 0; j < 10; j++){ grades[i][j] = 0; } } ```

Step by step solution

Declare a two-dimensional array

Start by declaring a two-dimensional integer array named "grades". To declare an array, the syntax is data_type array_name[number_of_rows][number_of_columns]. In our case, the data_type is int (integer), the array_name is grades, the number_of_rows is 30, and the number_of_columns is 10. ```c int grades[30][10]; ```

Initialize the two-dimensional array

Since we have declared the two-dimensional array, we can now optionally proceed to initialization. Initialize the array if you have specific values you wish to enter into the array. The initialization can be done manually or using loops. Here, we'll use nested loops to initialize the array with value 0 for the sake of simplicity. ```c for(int i = 0; i < 30; i++){ for(int j = 0; j < 10; j++){ grades[i][j] = 0; } } ``` Now, we have defined and initialized a two-dimensional array named 'grades' with 30 rows and 10 columns.

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Define a two-dimensional array of integers named grades. It should have 30 rows and 10 columns.

Short Answer

Step by step solution

Declare a two-dimensional array

Initialize the two-dimensional array

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