deallocate memory in c
// Use malloc to allocate memory
ptr = (castType*) malloc(size);
int *exampl = (int*) malloc(sizeof(int));
// Use calloc to allocate and inizialize n contiguous blocks of memory
ptr = (castType*) calloc(n, size);
char *exampl = (char*) calloc(20, sizeof(char));
0
1
// 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!
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2022-03-27 22:30:45
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