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The ones who are crazy enough to think they can change the world are the ones who do.
- Steve Jobs

C Pointer To Strings

A String is a sequence of characters stored in an array. A string always ends with null ('\0') character. Simply a group of characters forms a string and a group of strings form a sentence. A pointer to array of characters or string can be looks like the following:

Pointer to string in c

C Program - Pointers To Strings 1

pointer-strings-1.c
#include <stdio.h>
int main()
{
char *cities[] = {"Iran", "Iraq"};
int i;
for(i = 0; i < 2; i++)
printf("%s\n", cities[i]);
return 0;
}
  • Iran
  • Iraq

Note:

In the above pointer to string program, we declared a pointer array of character datatypes and then few strings like "Iran", "Iraq" where initialized to the pointer array (*cities[]). Note that we have not declared the size of the array as it is of character pointer type. Coming to the explanation, cities[] is an array which has its own address and it holds the address of first element (I (Iran) ) in it as a value. This address is then executed by the pointer, i.e) pointer start reading the value from the address stored in the array cities[0] and ends with '\0' by default. Next cities[1] holds the address of (I (Iraq).This address is then executed by the pointer, i.e) pointer start reading the value from the address stored in the array cities[1] and ends with '\0' by default. As a result Iran and Iraq is outputted.

C Program - Pointers To Strings 2

pointer-strings-2.c
#include <stdio.h>
#include <string.h>
void function(char**);
int main()
{
char *str = "Pointer-to-string";
int i, j = strlen(str);
for(i = 0; i < j; i++)
printf("%c", *str++);
return 0;
}
  • Pointer-to-string

Note:

*str is a char pointer variable which is initialized by a string "Pointer-to-String". Then strlen() is used to find the length of the string to do iteration using for loop is done to print the complete characters store with the variable name *str.

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