有没有C++函数来计算两个索引之间的距离？

#include <iostream>
#include <cmath>

int calculateDistance(int index1, int index2) {
    int distance = std::abs(index2 - index1);
    return distance;
}

int main() {
    int index1 = 5;
    int index2 = 10;
    int distance = calculateDistance(index1, index2);
    std::cout << "The distance between index " << index1 << " and index " << index2 << " is " << distance << std::endl;
    return 0;
}