Pointers

1. RELATION BETWEEN STRING
AND POINTERS

2. STRINGS IN C
• String in C programming is a sequence of characters terminated
with a null character‘0’.
• Strings are defined as an array of characters.
Declaration
char str_name[size];

3. EXAMPLE FOR STRING
• #include <stdio.h>
• int main()
• {
• char name[20];
• printf(“Enter name:“);
• scanf(“%s”, name);
• printf(“Your name is %s.”, name);
• return 0;
• }

4. POINTERS IN C
•A pointer is a variable that stores the memory
address of another variable as its value.
•In other words, it points to the location of a variable
and can indirectly access the variable.
• Pointers are declared using the *symbol.
• * => Asterisk
•Declaration
•int *ptr;

5. EXAMPLE FOR POINTERS
• #include<stdio.h>
• int main()
• {
• int* p, c, d;
• c = 5;
• d = -15;
• p = &c; printf(“%d”, *p); // Output: 5
• p = &d; printf(“%d”, *p); // Ouptut: -15
• return 0;
• }

6. EXAMPLE
• #include <stdio.h>
• int main(void)
• {
• char *strPtr = “Hello”;
• char *t = strPtr;
• while(*t != ‘0’)
• {
• printf(“%c”, *t);
• t++;
• }
• return 0;
• }