I want to make a function in C that prints a 2D array

Question

I know how to print a 2D array without using a function (using nested for loops), but how would I implement a fuction that prints it.

This is what I tried

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

Answer 1

You want this:

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

int main(int argc, char *argv[])
{
   int N = 4;
   int M = 4;
   //...
   int arr[M][N];
   //...
    print_matrix(M, N, arr);
}

Answer 2

you need to add int M, int N to the function:

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

how to call your fucntion:

int M = 5;
int N = 4;
//define your array
int arr[M][N];

print_matrix(M, N, arr)