C 中返回数组？

我无法在 C 中返回数组，我对 C 很陌生，所以我可能会犯一些有趣的错误，这里是 代码：

#define MAXSIZE 100
int recievedNumbers[MAXSIZE];
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  recievedNumbers = getACOfNumber(256);
  for (int i = 0; i < sizeof(recievedNumbers) / 8; i++) {
    Serial.print(recievedNumbers[i]);
  }
  Serial.println();
}

int* getACOfNumber(int theNumber) {
  bool done = false;
  int i = 0;
  int theArray[100];
  while (!done) {
    if (theNumber % 2 == 0) {
      theNumber = theNumber / 2;
      theArray[i] = 2;
    } else if (theNumber % 3 == 0) {
      theNumber = theNumber / 3;
      theArray[i] = 3;
    }
    else if (theNumber % 5 == 0) {
      theNumber = theNumber / 5;
      theArray[i] = 5;
    }
    else if (theNumber % 7 == 0) {
      theNumber = theNumber / 7;
      theArray[i] = 7;
    } else {
      theArray[i] = theNumber;
      done = true;
    }
    i++;
  }
  return theArray;
}

错误信息 ：

AC：10：错误：将“int *”分配给“int”时类型不兼容 [100]'

退出状态 1 将“int*”赋值给“int”时类型不兼容 [100]'

您不能从表达式分配给数组：

int recievedNumbers[MAXSIZE];
...
recievedNumbers = getACOfNumber(256);

Instead:

memcpy(receivedNumbers, getACOfNumber(256), sizeof(receivedNumbers));

请注意，您正在使用其生命周期以该函数结束的本地数组，请更改为

static int theArray[100];

或者更好

int *theArray = calloc(100, sizeof(*theArray)); /* Zero initializes the array */

别忘了打电话free在最后：

int *temp = getACOfNumber(256);

memcpy(receivedNumbers, temp, sizeof(receivedNumbers));
free(temp);

但为什么不将原始数组传递给函数呢？：

getACOfNumber(receivedNumbers);
...
void getACOfNumber(int *theArray) {