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#include <stdio.h>
int main(int argc, char *argv[])
{
// create 2 arrays we care about
int ages[] = {23, 43, 12, 89, 2};
char *names[] = {
"Alan", "Frank",
"Mary", "John", "Lisa"
};
// safely get the size of the ages
int count = sizeof(ages) / sizeof(int);
int i = 0;
// first way using indexing
for(i=0; i < count; i++) {
printf("%s has %d years alive. \n",
names[i], ages[i]);
}
printf("---\n");
// setup the pointers to the start of the arrays
int *cur_age = ages;
char **cur_name = names;
// second way using pointers
for(i=0; i < count; i++) {
printf("%s is %d years old.\n",
*(cur_name+i), *(cur_age+i));
}
printf("---\n");
// third way, pointers are just arrays
for(i=0; i < count; i++) {
printf("%s is %d years old again.\n",
cur_name[i], cur_age[i]);
}
printf("---\n");
// fourth way with pointers in a stupid complex way
for(cur_name = names, cur_age = ages;
(cur_age - ages) < count;
cur_name++, cur_age++)
{
printf("%s lived %d years for far.\n",
*cur_name, *cur_age);
}
printf("---\n");
for(i=0; i < count; i++) {
printf("name: %p age: %p.\n",
&cur_name[i], &cur_age[i]);
}
return 0;
}