Create 2d_address.c

2d_address.c

@@ -0,0 +1,54 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() 
+{
+    int **arr; // Declare a pointer to a pointer to int
+    int rows, cols,i,j,size,address;
+    char ch;
+    size=sizeof(int);
+    int base=(int)&arr[0][0];
+    //taking the number of rows and columns from the user
+    printf("Enter the number of rows: ");
+    scanf("%d", &rows);
+    printf("Enter the number of columns: ");
+    scanf("%d", &cols);
+
+    // Dynamically allocating memory for the 2D array
+    arr = (int **)malloc(rows * sizeof(int *));
+    for (i = 0; i < rows; i++) 
+    {
+        arr[i] = (int *)malloc(cols * sizeof(int));
+    }
+
+    // Checking if memory allocation was successful
+    if (arr == NULL) {
+        printf("Memory allocation failed.\n");
+        return 1;
+    }
+    //ask user the index of the array to find the address of that index
+    do
+    {
+        printf("\nEnter row no.: ");
+        scanf("%d",&i);
+        printf ("\nEnter col no.: ");
+        scanf("%d",&j);
+        if(i>rows||j>cols||i<0||j<0)
+        {
+            printf("you are trying to find the address of a non allocated memory\n");
+        }
+        else
+        {
+            address = base+(i*cols+j)*size;
+            printf("Memory address of arr[%d][%d]: %p\n", i, j, (void *)address);
+        }
+        printf("Do you want to try again with the other index:- Y/y for Yes\n");
+        scanf(" %c",&ch);
+    }while(ch=='Y'||ch=='y');
+    // Freeing the dynamically allocated memory
+    for (int i = 0; i < rows; i++) {
+        free(arr[i]);
+    }
+    free(arr);
+    return 0;
+}