pointers in array

Author: surprisedPikachu007

pointers/2d_array.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int main() {
+    int a[3][3] = {0,1,2,3,4,5,6,7,8};
+
+    // we take an integer's size as 4 bytes
+
+    printf("a = %d \n", a);  // a = -11360
+    printf("*a = %d\n", *a);  // *a = -11360
+    printf("**a = %d\n\n", **a);  // **a = 0
+
+    printf("a + 1 = %d\n", a + 1);  // a + 1 = -11348
+    printf("*a + 1 = %d *(a + 1) = %d\n", *a + 1, *(a + 1));  // *a + 1 = -11356  *(a + 1) = -11348
+    printf("**a + 1 = %d *(*a + 1) = %d *(*(a + 1)) = %d\n\n", **a + 1, *(*a + 1), *(*(a + 1)));  // **a + 1 = 1 *(*a + 1) = 1 *(*(a + 1)) = 3
+
+}

pointers/array_pointer.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+
+int main() {
+    int a[] = {1,20,30,40,50};
+    int n = 5;
+
+    printf("%d\n[%d] = %d\n\n", a, a, *a);
+
+    scanf("%d", &a[0]); // 10
+    
+    printf("\n%d %d\n\n", *a+1, *(a+1)); // 11 20
+
+    for(int i = 0; i < n; i++)
+        scanf("%d", a + i);  // 1 2 3 4 5
+
+    for(int i = 0; i < n; i++) 
+        printf("%d ", *a + i);  // 1 2 3 4 5
+}

pointers/char_array.c

@@ -0,0 +1,9 @@
+#include <stdio.h>
+
+int main() {
+    char a[3][5] = {"abc", "abcde", "abc"};
+
+    printf("a = %d *a = %s **a = %c\n", a, *a, **a);
+
+    printf("a + 1 = %s *a + 1 = %s *(a + 1) = %s\n", a + 1, *a + 1, *(a + 1));
+}