此错误：“C6262：函数使用'1600000620'字节的堆栈：超出/分析：stacksize'16384'。考虑将一些数据移动到堆”

Question

当我构建代码时，这个运行没有问题，但是我调试代码，这会生成消息：函数使用 '1600000620' bytes of stack: beyond/analyze:stacksize 16384'。

我将声明：int array[2000][2000] 放入 int main{}，因为当 int array[2000][2000] 超出 int main{} 时，会生成错误：array is ambiguous。

#include <iostream> 
#include <fstream> 
#include <sstream> 
using namespace std;

/* Function to sort an array using insertion sort*/
void insertionSort(int arr[], int n)
{
    int i, key, j;
    for (i = 1; i < n; i++){
        key = arr[i];
        j = i - 1;
        /* Move elements of arr[0..i-1], that aregreater than key, to one 
position aheadof their current position */
        while (j >= 0 && arr[j] > key){
            arr[j + 1] = arr[j];
            j = j - 1;
        }
        arr[j + 1] = key;
    }
}

int arr[2000][2000];
int main()
{
    int array[2000][2000];
    int window[9], row = 0, col = 0, numrows = 0, numcols = 0, MAX = 0;
    ifstream infile("phone.jpg");
    stringstream ss;
    string inputLine = "";

    // First line : version
    getline(infile, inputLine);
    if (inputLine.compare("P2") != 0) cerr << "Version error" << endl;
    else cout << "Version : " << inputLine << endl;

    // Continue with a stringstream
    ss << infile.rdbuf();

    // Secondline : size of image
    ss >> numcols >> numrows >> MAX;

    //print total number of rows, columns and maximum intensity of image
    cout << numcols << " columns and " << numrows << " rows" << endl<< 
    "Maximium Intesity "<< MAX <<endl; 

    //Initialize a new array of same size of image with 0
    for (row = 0; row <= numrows; ++row)
    {
        array[row][0] = 0;
    }
    for (col = 0; col <= numcols; ++col) {
        array[0][col] = 0;
    }

    // Following lines : data
    for (row = 1; row <= numrows; ++row)
    {
        for (col = 1; col <= numcols; ++col)
        {
            //original data store in new array
            ss >> array[row][col];
        }
    }

    // Now print the array to see the result
    for (row = 1; row <= numrows; ++row)
    {
        for (col = 1; col <= numcols; ++col)
        {
        //neighbor pixel values are stored in window including this pixel
            window[0] = array[row - 1][col - 1];
            window[1] = array[row - 1][col];
            window[2] = array[row - 1][col + 1];
            window[3] = array[row][col - 1];
            window[4] = array[row][col];
            window[5] = array[row][col + 1];
            window[6] = array[row + 1][col - 1];
            window[7] = array[row + 1][col];
            window[8] = array[row + 1][col + 1];

            //sort window array
            insertionSort(window, 9);

            //put the median to the new array 
            arr[row][col] = window[4];
        }
    }

    ofstream outfile;

    //new file open to stroe the output image 
    outfile.open("Medianfilter.pnm");
    outfile << "P2" << endl;
    outfile << numcols << " " << numrows << endl;
    outfile << "255" << endl;

    for (row = 1; row <= numrows; ++row)
    {
        for (col = 1; col <= numcols; ++col)
        {
            //store resultant pixel values to the output file
            outfile << arr[row][col] << " ";
        }
    }

    outfile.close();
    infile.close();
    return 0;
}

我希望这个程序可以清除图像，去除图像中的噪点。

Answer 1

您无法将声明 int array[2000][2000]; 移动到全局范围内，因为您使用的是 using namespace std;。

using namespace std; 语句指示编译器将在命名空间std 中找到的所有名称导入全局命名空间，以便您可以直接使用它们（例如string）而不是通过它们的命名空间访问它们（例如@ 987654328@).

这通常是不鼓励的，请参阅this question，你有一个完美的例子来说明为什么。

从 C++11 开始，在标准库命名空间 std 中有一个名为 array 的类模板，参见 reference for std::array。

这意味着array 已经可能在全球范围内具有意义。然后，您尝试声明一个名为 array 的变量，编译器不再知道 array 是否应该引用您声明的变量或从标准库命名空间导入的类模板。因此错误消息。

要解决此问题，请为变量使用不同的名称 array，或者更好的是，不要使用 using namespace std;，并使用 std:: 限定对标准库的所有引用。

Answer 2

更改变量数组的名称，将其移出 int main{}，在 int main{} 解决问题之前。之所以产生歧义，是因为数组是 C++ 中的一个类，而在它之前的代码中，它是如何被声明为整数的。所以把 name 数组改成另一个任意名字，比如 arr1 就可以解决问题了。

#include <iostream> 
#include <fstream> 
#include <sstream> 
using namespace std;

/* Function to sort an array using insertion sort*/
void insertionSort(int arr[], int n)
{
    int i, key, j;
    for (i = 1; i < n; i++){
        key = arr[i];
        j = i - 1;
        /* Move elements of arr[0..i-1], that aregreater than key, to one position 
 aheadof their current position */
        while (j >= 0 && arr[j] > key){
            arr[j + 1] = arr[j];
            j = j - 1;
        }
        arr[j + 1] = key;
    }
}

int arr[2000][2000];
int arr1[2000][2000];
int main()
{

    int window[9], row = 0, col = 0, numrows = 0, numcols = 0, MAX = 0;
    ifstream infile("phone.pmg");
    stringstream ss;
    string inputLine = "";

    // First line : version
    getline(infile, inputLine);
    if (inputLine.compare("P2") != 0) cerr << "Version error" << endl;
    else cout << "Version : " << inputLine << endl;

    // Continue with a stringstream
    ss << infile.rdbuf();

    // Secondline : size of image
    ss >> numcols >> numrows >> MAX;

    //print total number of rows, columns and maximum intensity of image
    cout << numcols << " columns and " << numrows << " rows" << endl<< "Maximium 
    Intesity "<< MAX <<endl; 

    //Initialize a new array of same size of image with 0
    for (row = 0; row <= numrows; ++row)
    {
        arr1[row][0] = 0;
    }
    for (col = 0; col <= numcols; ++col) {
        arr1[0][col] = 0;
    }

    // Following lines : data
    for (row = 1; row <= numrows; ++row)
    {
        for (col = 1; col <= numcols; ++col)
        {
            //original data store in new array
            ss >> arr1[row][col];
        }
    }

    // Now print the array to see the result
    for (row = 1; row <= numrows; ++row)
    {
        for (col = 1; col <= numcols; ++col)
        {
            //neighbor pixel values are stored in window including this pixel
            window[0] = arr1[row - 1][col - 1];
            window[1] = arr1[row - 1][col];
            window[2] = arr1[row - 1][col + 1];
            window[3] = arr1[row][col - 1];
            window[4] = arr1[row][col];
            window[5] = arr1[row][col + 1];
            window[6] = arr1[row + 1][col - 1];
            window[7] = arr1[row + 1][col];
            window[8] = arr1[row + 1][col + 1];

            //sort window array
            insertionSort(window, 9);

            //put the median to the new array 
            arr[row][col] = window[4];
        }
    }

    ofstream outfile;

    //new file open to stroe the output image 
    outfile.open("Medianfilter.pmn ");
    outfile << "P2" << endl;
    outfile << numcols << " " << numrows << endl;
    outfile << "255" << endl;

    for (row = 1; row <= numrows; ++row)
    {
        for (col = 1; col <= numcols; ++col)
        {
            //store resultant pixel values to the output file
            outfile << arr[row][col] << " ";
        }
    }

    outfile.close();
    infile.close();
    return 0;
}