Asking user to input the sizes of 2D array C program

I'm coding a C program that asks the user to input two variables that represent the 2d array sizes and then print the array, I don't know where the problem is! any help?

`#include <stdio.h>
int main(void) {
int n, x, i, j;
int arr[n][x];
printf("Enter no of columns:");
scanf("%d", &n);
printf("Enter no of rows:");
scanf( "%d", &x);
printf("Enter elements: \n");
for (i = 0; i < n; i++)
for (j = 0; j < x; j++)
 scanf("%d", &arr[i][j]);
for (i = 0; i < n; i++){
  for (j = 0; j < x; j++)
  printf("%d \t", arr[i][j]);
  printf("\n");
}   
return 0;```
}``

You need to declare your variable length array arr after having initialized the variables you use to specify rows and columns. I also suggest naming the variables differently to not confuse readers.

Example:

#include <stdio.h>

int main(void) {
    int rows, cols;

    printf("Enter no of columns:");
    if(scanf("%d", &cols) != 1 || cols < 1) return 1;

    printf("Enter no of rows:");
    if(scanf("%d", &rows) != 1 || rows < 1) return 1;

    int arr[rows][cols]; // declare it after rows and cols have been initialized

    printf("Enter elements: \n");
    for(int i = 0; i < rows; i++) {
        for(int j = 0; j < cols; j++) {
            if(scanf("%d", &arr[i][j]) != 1) return 1;
        }
    }

    for(int i = 0; i < rows; i++) {
        for(int j = 0; j < cols; j++) {
            printf("%d \t", arr[i][j]);
        }
        putchar('\n');
    }
}