从目标c中的一组int值中找到最接近的Int值 [英] finding the closest Int value from a set of int values in objective c

问题描述

目标c数学函数问题

我有一个ax值，我想与一组中的其他值进行比较，然后确定集合中的哪个值我的x值最接近。

I've got a x value that i'd like to compare to other values within a set, then determine which value from the set my x value is closest to.

例如，假设我已经获得了5,10,15,20,25的投注。

For example, lets say i've got the ints 5, 10, 15, 20, 25.

确定哪些数字最接近7的最佳方法是什么？

What is the best way to determine which of these numbers is closest to 7?

推荐答案

    int closestDistance = INT32_MAX;
    int indexOfClosestDistance = -1;
    int x = 7;

    for (int i=0; i < [yourArray count]; i++)
    {
        int num = yourArray[i];
        int diff = abs(num - x);

        if (diff < closestDistance)
        {
            closestDistance = diff;
            indexOfClosestDistance = i ;
        }
    }

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