How do you allocate a matrix using a single pointer in C?(r and c are the…
2025
How do you allocate a matrix using a single pointer in C?(r and c are the number of rows and columns respectively)
Answer: B. int *arr = (int *)malloc(r * c * sizeof(int)); — Answer: b Explanation: To allocate a matrix using a single pointer in C, you must calculate the total memory size required. This is done by multiplying the…
- A.
int *arr = malloc(r * c * sizeof(int));
- B.
int *arr = (int *)malloc(r * c * sizeof(int));
- C.
int *arr = (int *)malloc(r + c * sizeof(int));
- D.
int *arr = (int *)malloc(r * c * sizeof(arr));
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Correct answer: B
Answer: b Explanation: To allocate a matrix using a single pointer in C, you must calculate the total memory size required. This is done by multiplying the number of rows (r) and columns (c) by the size of the data type (e.g., sizeof(int)). The allocation is performed using malloc(r * c * sizeof(int)), which reserves a contiguous block of memory for the matrix elements.