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#include <stdio.h> int main(){     int num,r,reverse=0;     printf( "Enter any number: " );     scanf( "%d" ,&num);     while (num){          r=num%10;          reverse=reverse*10+r;          num=num/10;     }     printf( "Reversed of number: %d" ,reverse);     return 0; } Sample output: Enter any number: 12 Reversed of number: 21 Code 2: Reverse very large or big numbers beyond the rang Logic is we accept the number as string #include <stdio.h> #define MAX 1000 int main(){     char num[MAX];     int i=0,j,flag=0;     printf( "Enter any positive integer: " );     scanf( "%s" ,num);     whil...

Code 1: 1. Warp to check a number is Armstrong 2. C program to check whether a number is Armstrong or not 3. Simple c program for Armstrong number 4. Armstrong number in c with output #include <stdio.h> int main(){     int num,r,sum=0,temp;     printf( "Enter a number: " );     scanf( "%d" ,&num);     temp=num;     while (num!=0){          r=num%10;          num=num/10;          sum=sum+(r*r*r);     }     if (sum==temp)          printf( "%d is an Armstrong number" ,temp);     else          printf( "%d is not an Armstrong number" ,temp);     return 0; } Sample output: Enter a numb...