Consider the following declaration: int *arr1[20], arr2[10][10];Which of the following expressions will not give compile-time errors if used as left-hand sides of assignment statements in a C program? Choose the most appropriate answer.A. arr1[2]B. arr1[2][3]C. arr2[2]D. arr2[2][3]a.D onlyb.A, B, Dc.B, C, Dd.B, D
Question
Consider the following declaration: int *arr1[20], arr2[10][10];Which of the following expressions will not give compile-time errors if used as left-hand sides of assignment statements in a C program? Choose the most appropriate answer.A. arr1[2]B. arr1[2][3]C. arr2[2]D. arr2[2][3]a.D onlyb.A, B, Dc.B, C, Dd.B, D
Solution
To determine which expressions will not give compile-time errors if used as left-hand sides of assignment statements, let's analyze each option:
A. arr1[2] This expression refers to the element at index 2 in the array arr1. Since arr1 is declared as int *arr1[20], it is an array of 20 pointers to integers. Therefore, accessing an element using arr1[2] is valid and will not result in a compile-time error.
B. arr1[2][3] This expression attempts to access the element at index 3 in the array at index 2 of arr1. However, arr1 is declared as an array of pointers, not a two-dimensional array. Therefore, accessing an element using arr1[2][3] will result in a compile-time error.
C. arr2[2] This expression refers to the array at index 2 in the two-dimensional array arr2. Since arr2 is declared as int arr2[10][10], it is a two-dimensional array of integers. Accessing an array using arr2[2] is valid and will not result in a compile-time error.
D. arr2[2][3] This expression attempts to access the element at index 3 in the array at index 2 of arr2. Since arr2 is a two-dimensional array, accessing an element using arr2[2][3] is valid and will not result in a compile-time error.
Based on the analysis above, the expressions that will not give compile-time errors if used as left-hand sides of assignment statements are:
A. arr1[2] C. arr2[2] D. arr2[2][3]
Therefore, the most appropriate answer is option b. A, B, D.
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