Void pointers

Author: georgecatalin

Advanced Pointers/Void pointers/pointer_arithmetic_with_void_pointers.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+int main(void)
+{
+    int myArray[]={10,43,65};
+
+    void *this_pointer=&myArray[1]; //this points to the second element of the array thus 43
+
+    this_pointer+=sizeof(int); // pointer arithmetic this offsets with the size of one int thus -> 65
+
+    printf("%d\n",*(int *) this_pointer); //should show 65
+
+    return 0;
+}

Advanced Pointers/Void pointers/size_of_void_pointers.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int main(void)
+{
+    void *void_pointer=NULL;
+    int *int_pointer=NULL;
+    float *float_pointer=NULL;
+    char *char_pointer=NULL;
+
+    printf("Size of the void * is %d.\n",sizeof(void_pointer));
+    printf("Size of the int * is %d.\n",sizeof(int_pointer));
+    printf("Size of the float * is %d.\n",sizeof(float_pointer));
+    printf("Size of the char * is %d.\n",sizeof(char_pointer));
+
+    return 0;
+}

Advanced Pointers/Void pointers/using_void_pointer_example1.c

@@ -0,0 +1,22 @@
+#include <stdio.h>
+
+int main(void)
+{
+    int a=10;
+    int pi=3.14;
+    int myChar='G';
+
+
+    void *void_pointer=NULL;
+
+    void_pointer=&a;
+    printf("The value stored in 'void_pointer' is %d.\n",*(int *)void_pointer);
+
+    void_pointer=&pi;
+    printf("The value stored in 'void_pointer' is %.2f.\n",*(float *)void_pointer);
+
+    void_pointer=&myChar;
+    printf("The value stored in 'void_pointer' is %c.\n",*(char *)void_pointer);
+
+    return 0;
+}