Answer Posted / rahul kumar

/* Program to reverse any string input by the user without
using library function strlen( );*/

#include <stdio.h>
#include<conio.h>
void main()
{
char a[]={"sixaN: you are with us or against us"};
int i,len=0;
char *b;
clrscr();
b=a;
while(*b!='\0')
{
len++;
b++;
} //counting lenght of string

for(i=len;i>-1;i--)
printf("%c",a[i]); //printing charachters in reverse
getch();


Output :

su tsniaga ro su htiw era uoy :Naxis

1) write a program to generate 1st n fibonacci prime numbers using Nested if 2) write a program to generate twin prime numbers from m to n using nested if 3) write a program to check whether a given integer is a strong number or not using nested if 4) Write a program to generate prime factors of a given integer using nested if 5)write a program to generate prime numbers from m to n using nested if 6)write a program to generate perfect numbers from m to n using nested if 7)write a program to generate the pallindromes from m to n using neste if 8)write a program to generate armstrong numbers from m to n using nested if 9)write a program to generate strong numbers from m to n using nested if

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