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What does the following code snippet do?1double *values = (double*)calloc(10, sizeof(double));

Question

What does the following code snippet do?

double *values = (double*)calloc(10, sizeof(double));
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Solution

This code snippet is written in C. It does the following:

  1. It declares a pointer to a double named values.

  2. It then allocates memory for 10 doubles using the calloc function. The calloc function is a memory allocation function that initializes the allocated memory to zero. The size of the memory to be allocated is calculated by multiplying the number of elements (10 in this case) by the size of each element (sizeof(double) in this case).

  3. The (double*) before calloc is a type cast that ensures the returned pointer from calloc is of type double*.

  4. The pointer to the first byte of the allocated memory is then assigned to values.

So, in summary, this code snippet is used to dynamically allocate memory for an array of 10 doubles, and the pointer to this array is stored in values. The allocated memory is initialized to zero.

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