/*
* Structures bigger than 32K
* This is a very simple program to demonstrate using dynamically allocated structs
* of larger than 32K in size.
* This example will allocate a struct larger than 32k, then fill the array field of the
* struct with some squares of numbers and the char fields of the struct with some
* chars, and then print out the contents of the struct.
*/
#include
#include
#define myArraySize 4000
typedef struct {
long *my array;
char aChar;
char anotherChar;
// other fields of the struct here;
} myLargeStructType;
myLargeStructType *myLargeStruct;
main()
{
long i;
/* first allocate struct */
/* and of course check for allocation getting done w/o error */
if ((myLargeStruct = malloc(sizeof(myLargeStructType))) == NULL)
{
printf ("Unable to allocate memory for struct\n");
exit(1);
}
/* now allocate array field of struct */
if ((myLargeStruct->myarray = (long *) calloc (myArraySize, sizeof (long)))
== NULL)
{
printf ("Unable to allocate memory for array\n");
exit (1);
}
/* now to see how to use the struct, fill array field with all squares of i */
for (i = 0; i < myArraySize; i++)
{
myLargeStruct->my array[i] = i*i;
}
/* now fill char fields of struct */
myLargeStruct->aChar = 'a';
myLargeStruct-> anotherChar = 'b';
/* now print out first 10 squares */
for (i = 0; i < 10; i++)
printf ("%ld %ld\n", i, myLargeStruct->my array[i]);
/* now print out char fields */
printf ("%c %c\n", myLargeStruct->aChar, myLargeStruct-> anotherChar);
}