Pointer Arithmetic

#include <stdio.h>

int main(void) {
    int values[] = {10, 20, 30, 40};
    int sum = 0;
    for (int *p = values; p < values + 4; ++p) sum += *p;
    printf("sum=%d distance=%td\n", sum, (values + 4) - values);
    return 0;
}

#include <iostream>
#include <vector>

int main() {
    std::vector values{10, 20, 30, 40};
    int sum = 0;
    for (auto it = values.begin(); it != values.end(); ++it) sum += *it;
    std::cout << "sum=" << sum << " distance="
              << std::distance(values.begin(), values.end()) << '\n';
}