pointers.pptx
- 5. Declaration Of Pointer Variables
- 6. Assigning Address To Pointer Variables
- 9. Pointer Arithmetic Pointers variables are also known as address data types because they are used to store the address of another variable. The address is the memory location that is assigned to the variable. It doesn’t store any value. The operations are: • Increment/Decrement of a Pointer • Addition of integer to a pointer • Subtraction of integer to a pointer • Subtracting two pointers of the same type • Comparison of pointers of the same type.
- 12. Addition // C program to illustrate pointer Addition #include <stdio.h> // Driver Code int main() { // Integer variable int N = 4; // Pointer to an integer int *ptr1, *ptr2; // Pointer stores the address of N ptr1 = &N; ptr2 = &N; printf("Pointer ptr2 before Addition: "); printf("%p n", ptr2); // Addition of 3 to ptr2 ptr2 = ptr2 + 3; printf("Pointer ptr2 after Addition: "); printf("%p n", ptr2); return 0; }
- 13. Subtraction // C program to illustrate pointer Subtraction #include <stdio.h> // Driver Code int main() { // Integer variable int N = 4; // Pointer to an integer int *ptr1, *ptr2; // Pointer stores the address of N ptr1 = &N; ptr2 = &N; printf("Pointer ptr2 before Subtraction: "); printf("%p n", ptr2); // Subtraction of 3 to ptr2 ptr2 = ptr2 - 3; printf("Pointer ptr2 after Subtraction: "); printf("%p n", ptr2); return 0; }
- 17. Passing Pointer to a Function When we pass a pointer as an argument instead of a variable then the address of the variable is passed instead of the value. So any change made by the function using the pointer is permanently made at the address of passed variable. This technique is known as call by reference in C.
- 19. Swapping two numbers using Pointers
- 23. Pass Arrays to Functions
- 25. Pointers To Functions or Function Pointers
- 26. Declaring A Pointer To A Function
- 27. 11.600000