Question

我是编程的新手，我必须为我的cs课完成这项任务。任务在源代码中给出。

/**@file Activity_3_1.cpp
 * @brief Activity 3.1 Gives Basic Practice for Arrays.
 * <PRE>
 * Activity 3.1
 * Gives Basic Practice for Arrays.
 * 1. Write a function to fill integer Array, size of the array participants can
 * choose. The function should take an array - which is to be filled - and a
 * size of array as its arguments.
 * 2. Write function to print the contents of an integer array. The function
 * should take an array and a size of array as its arguments.
 * 3. Write a funciton to find the sum total of the integer array element. The
 * function should take an array and a size of array as its arguments.
 * 4. Write a function to find the Average of the integer array element. The
 * function should take an array and a size of array as its arguments.
 * 5. Write a main function which utilizes all above functions, and print the
 * output of each function.
 * 6. For each of the above participants can choose their own algorithms.
 * </PRE>
 */
#include <iostream>
using namespace std;
/**@fn fillArray(const int sizeOfArray)
 * @brief Fills the Array.
 * function to fill array. it takes the size of the array and based on that
 * takes elements from the user.
 * @param array int []
 * @param sizeOfArray const int
 */
// function to fill array. it takes the size of the array and based on that
// takes elements from the user.

void fillArray(int *array, const int sizeOfArray);

/**@fn printArray(const int array[], const int sizeOfArray)
 * @brief prints the Array.
 * function to print the array. It takes array and the sizeOfArray as arguments.
 * @param array int []
 * @param sizeOfArray const int
 */
// function to print the array. It takes array and the sizeOfArray as arguments.
void printArray(const int array[], const int sizeOfArray);

/**@fn sumTotalOfArray(const int array[], const int sizeOfArray)
 * @brief find the total of array elements.
 * funciton to find the sum-total of array. Takes array and it's size as
 * arguments.
 * @param array int []
 * @param sizeOfArray const int
 */
// funciton to find the sum-total of array. Takes array and it's size as
// arguments.
int sumTotalOfArray(const int array[], const int sizeOfArray);

/**@fn averageOfArray(const int array[], const int sizeOfArray)
 * @brief finds the average of array elements.
 */
// function to find the average of the array. Utilizes the sumTotalFunction.
// Arguments are Array and Size of Array.
double averageOfArray(const int array[], const int sizeOfArray);

void fillArray(int *array, const int sizeOfArray) {
  for (int i; i > sizeOfArray; i++) {
    cout << "ievadiet elementa " << i << " vertibu : ";
    cin >> array[i];
    cout << "\n";
  }
  //  return array;
}

void printArray(const int array[], const int sizeOfArray) {
  for (int i; i > sizeOfArray; i++) {
    cout << i << " elementa vertiba : " << array[i] << "\n";
  }
}

int sumTotalOfArray(const int array[], const int sizeOfArray) {
  int sumTotal;
  for (int i; i > sizeOfArray; i++) {
    sumTotal += array[i];
  }
  return sumTotal;
}

double averageOfArray(const int array[], const int sizeOfArray) {
  double average;
  average = sumTotalOfArray(array, sizeOfArray) / sizeOfArray;
  return average;
  // Uses the sumTotalArray to find the sum total. it coverts the sum to double
  // to have average in decimal.
  //  //Write Your Code Here
}

int main() {
  // Defines a constant for the size of array.
  const int arraySize = 20;
  // Initializes array elements to zero.
  int myArray[arraySize];
  for (int i; i > arraySize; i++) {
    myArray[i] = 0;
  }
  // fills the array.
  fillArray(myArray, arraySize);
  // prints the array
  printArray(myArray, arraySize);
  // finds the average of the array.
  double myaverage = averageOfArray(myArray, arraySize);
  cout << "this is the average: " << myaverage << "\n";
}

当我试图让程序通过指针将myArray传递给fillArray函数时，运行时错误开始出现，所以我很确定这就是造成我问题的原因。该数组应该由用户填充，所以我试图让函数访问main范围内的实际数组。我把我的程序与我在网上找到的其他例子进行了比较，我找不到错误。

程序在执行时显示：

"Process returned -1073741819 (0xC0000005) execution time : 0.434 s Press any key to continue."

Answer 1

问题在于你的for循环：

for (int i;i> arraySize; i++)
{
    myArray[i]=0;
}

您需要初始化i，因为在C ++中，如果不这样做，它将不会采用默认值。
i> arraySize表示“i 大于数组大小”，这与您想要的相反。

尝试：

for (int i = 0; i < arraySize; i++)
{
    myArray[i] = 0;
}

为了它的价值，我被教导要记住>和<的方向，就是把这个象征想象成鳄鱼的嘴，总是吃掉最大的鱼......： - ）

Answer 2

你弄错了所有的陈述。

  for (int i; i > arraySize; i++)...

应该阅读

  for (int i= 0; i < arraySize; i++)...

即。从0开始，在i < arraySize

时向上计数

Answer 3

在我看来，for循环是错误的：它们应该看起来像

for(int i = <start value>; i < arraySize; i++)

否则你会冒未初始化的风险和错误的循环导致内存读/写错误。

运行时错误c ++通过指针传递数组到函数

3 个答案: