Reversing the string without using Library function

Reversing the string without using Library function

#include<stdio.h>

#include<string.h>

void main()

{

                char str[20], rev[20], temp;

                int i=0, j;

                printf("\nEnter the string: ");

                gets(str);

                j = strlen(str) - 1;

                while(i<j)

                {

                                temp = str[j];

                                str[j] = str[i];

                                str[i] = temp;

                                i++;

                                j--;

                }

                printf("\nReversed string: ");

                puts(str);

}

Output:

Enter the string:   newspaper

Reversed string:   repapswen

Also check,
https://tejaswinihbhat.blogspot.in/2016/08/strrev-reversing-string-using-library.html