一个“无聊”的关于指针的演示程序

#include <stdio.h>

int main(int argc, char *argv[])
{
// create two arrays we care about
int ages[] = {23, 43, 12, 89, 2};
char *names[] = {"Alan", "Frank","Mary", "John", "Lisa"};
// safely get the size of 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 so far.\n", *cur_name, *cur_age);
}

return 0;
}