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Question

How do you allocate a matrix using a single pointer in C? (M and N are the number of rows and columns respectively)

a.

int *arr = malloc(M * N * sizeof(int));

b.

int *arr = (int *)malloc(M * N * sizeof(int));

c.

int *arr = (int *)malloc(M + N * sizeof(int));

d.

int *arr = (int *)malloc(M * N * sizeof(arr));

Posted under Data Structures and Algorithms

Answer: (b).int *arr = (int *)malloc(M * N * sizeof(int));

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Q. How do you allocate a matrix using a single pointer in C? (M and N are the number of rows and columns respectively)
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