Write a C Program to reverse string using pointers and function

What are Pointers?

A pointer is a variable whose value is the address of another variable, i.e., direct address of the memory location. Like any variable or constant, you must declare a pointer before using it to store any variable address.

The general form of a pointer variable declaration is −

• type *var-name;

Here, type is the pointer’s base type; it must be a valid C data type and var-name is the name of the pointer variable.

The asterisk * used to declare a pointer is the same asterisk used for multiplication. However, in this statement the asterisk is being used to designate a variable as a pointer.

The unary or monadic operator & gives the “address of a variable’”.

The indirection or dereference operator * gives the “contents of an object pointed to by a pointer”.

Below is the source code for Program to reverse string using pointers and function which is successfully compiled and run on Windows System to produce desired output as shown below :

SOURCE CODE : :

/*  C Program to reverse string using pointers and function  */

#include <stdio.h>
#include <conio.h>

int main()
{
        char str[50];
        int len,i;
        char *s;

        printf("Enter any String :: ");
        scanf("%s",str);

        s=str;

        len=strlen(s);
        printf("\nThe Reverse of the String [ %s ] is :: ");
        for(i=len;i>=0;i--)
    {
       printf("%c",*(s+i));
    }

    printf("\n");

        return 0;
}

Output : :

/*  C Program to reverse string using pointer and function  */

Enter any String :: CodezClub

The Reverse of the String [ CodezClub ] is ::  bulCzedoC

Process returned 0

Above is the source code for C Program to reverse string using pointers and function which is successfully compiled and run on Windows System.The Output of the program is shown above .