将2D数组中的值传递给函数

时间:2019-07-11 12:30:41

标签: c++ function multidimensional-array arduino

我有一个255个四倍的数组,如下所示。

i的每次迭代都想将(正确的术语?)每个四元组的前三个值传递给一个函数(下面的getColourDistance中的三个?),以便返回计算结果。

该如何在Arduino的C ++变体中完成?

谢谢!

const int SAMPLES[][4] ={{2223, 1612,  930,  10}, {1855,  814,  530,  20}, {1225,  463,  438,  30}, {1306,  504,  552,  40}, ...};

byte samplesCount = sizeof(SAMPLES) / sizeof(SAMPLES[0]);

for (byte i = 0; i < samplesCount; i++)
{
  tcs.getRawData(&r, &g, &b, &c);
  colourDistance = getColourDistance(r, g, b, ?, ?, ?);
  // do something based on the value of colourDistance
}

int getColourDistance(int sensorR, int sensorG, int sensorB, int sampleR, int sampleG, int sampleB)
{
  return sqrt(pow(sensorR - sampleR, 2) + pow(sensorG - sampleG, 2) + pow(sensorB - sampleB, 2));
}

1 个答案:

答案 0 :(得分:2)

在这种情况下,可以将SAMPLES数组视为2维数组,因此SAMPLES [0] [0]将给出SAMPLES的1st一维数组的第1个元素,SAMPLES [0] [1]将给出样本的1st 1-d数组的2nd元素,依此类推,考虑到我们可以做到的这一术语,

#include <iostream>

const int SAMPLES[][4] = {{2223, 1612, 930, 10}, {1855, 814, 530, 20}, {1225, 463, 438, 30}, {1306, 504, 552, 40}, ...};

byte samplesCount = sizeof(SAMPLES) / sizeof(SAMPLES[0]);

for (byte i = 0; i < samplesCount; i++)
{
    //taking values of r,g,b as before    
    a=SAMPLES[i][0];//getting values of r,g,b 
    b=SAMPLES[i][1];//using the knowledge that SAMPLES[i][j]
    c=SAMPLES[i][2];//denotes jth element of ith 1-d array of SAMPLES
    colourDistance = getColourDistance(r, g, b, a, b, c);
}