W3School TIY Editor

#include <stdio.h> int main() { int myNumbers[5] = {10, 20, 30, 40, 50}; int *start = &myNumbers[1]; // 指向 20 int *end = &myNumbers[4]; // 指向 50 printf("%ld\n", end - start); // 相隔 3 个元素 return 0; }