C語言 傳遞2維(2D array)參數 到 函數

C語言  傳遞2維(2D array)參數 到 函數 

源自於
https://www.geeksforgeeks.org/pass-2d-array-parameter-c/
#include <stdio.h>
int M = 3;
int N = 3;

void print(int arr[M][N])
{
    int i, j;
    for (i = 0; i < M; i++)
    {
        for (j = 0; j < N; j++)
            printf("%d ", arr[i][j]);
        printf("\n"); 
    } 
}

int main()
{
    int arr[][3] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
    print(arr);
    return 0;
}

輸出畫面 
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#include <stdio.h>
int N = 3;

void print(int arr[][N], int m)
{
    int i, j;
    for (i = 0; i < m; i++)
    {
        for (j = 0; j < N; j++)
            printf("%d ", arr[i][j]);
        printf("\n");
    } 
}

int main()
{
    int arr[][3] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
    print(arr, 3);
    return 0;
}


輸出畫面 
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#include <stdio.h>

void print(int *arr, int m, int n)

{

    int i, j;

    for (i = 0; i < m; i++)

{

      for (j = 0; j < n; j++)

        printf("%d ", *((arr+i*n) + j));

 printf("\n");

}

}

  

int main()

{

    int arr[][3] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};

    int m = 3, n = 3;

  

    // We can also use "print(&arr[0][0], m, n);"

    print((int *)arr, m, n);

    return 0;

}




=========================================

// The following program works only if your compiler is C99 compatible.

#include <stdio.h>

  

// n must be passed before the 2D array

void print(int m, int n, int arr[][n])

{

    int i, j;

    for (i = 0; i < m; i++)

      for (j = 0; j < n; j++)

        printf("%d ", arr[i][j]);

}

  

int main()

{

    int arr[][3] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};

    int m = 3, n = 3;

    print(m, n, arr);

    return 0;

}