how to free memory in c
the C library function void free(void *ptr)
deallocates the memory previously allocated by a call to calloc, malloc, or realloc.
4.5
2
// declare a pointer variable to point to allocated heap space
int *p_array;
double *d_array;
// call malloc to allocate that appropriate number of bytes for the array
p_array = (int *)malloc(sizeof(int)*50); // allocate 50 ints
d_array = (int *)malloc(sizeof(double)*100); // allocate 100 doubles
// use [] notation to access array buckets
// (THIS IS THE PREFERED WAY TO DO IT)
for(i=0; i < 50; i++) {
p_array[i] = 0;
}
// you can use pointer arithmetic (but in general don't)
double *dptr = d_array; // the value of d_array is equivalent to &(d_array[0])
for(i=0; i < 50; i++) {
*dptr = 0;
dptr++;
}
Thank you!
2
0
4.33
7
int *example = NULL; //create pointer
example = malloc(sizeof(int)); //allocate memory
free(example); //deallocate memory
Thank you!
7
0
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