Multi-dim array assignment

Projects Programming
1

Hello. I am trying to use a 2D array to have an array of size 5 which holds arrays within. I have a function where i try to move the arrays to the next position:

ex: {{7,7,7,7},{4,4,4,4},{2,2,2,2},{3,3,3,3},{5,5,5,5}}

after the assignment where i add a new array and move all the others down one place would be:

{{8,8,8,8},{7,7,7,7},{4,4,4,4},{2,2,2,2},{3,3,3,3}}

but I am having trouble assigning these arrays and receive the error "invalid array assignment"

const int numValues = 4;                // How many values in an array 
const int trackingArraySize = 5;       //  how many arrays of values to keep
int trackingArray[trackingArraySize][numValues];
int arrayOfNewValues[numValues];

void loop() {
  
  // arrayOfNewValues array fills up with new values in a for loop..
  for (int i=0 ; i< numValues ; i++)
    arrayOfNewValues[i] = //Value in from sensor//

  valueTracker(arrayOfNewValues);
}

void valueTracker(int newValues[]) {

    for (int i=trackingArraySize-1 ; i >= 0 ; i-- ) 
      trackingArray[i] = trackingArray[i-1];           /// ERROR here: "invalid array assignment"
      
    trackingArray[0] = newValues;
}
2

Unlike some languages, C and C++ won't treat integer arrays as an individual item. You have to index them yourself:

void valueTracker(int newValues[]) {

    for (int i=trackingArraySize-1 ; i >= 0 ; i-- ) 
      for (int j=0; j<numValues; j++)
          trackingArray[i][j] = trackingArray[i-1][j];
      
    for (int j=0; j<numValues; j++)
       trackingArray[0][j] = newValues[j];
}

[/quote]

3

Thanks for the reply, that works great.