Reverse Number Using Recursion in C - Working Code

#include<stdio.h>
#include<conio.h>
int reverse(int);
void main()
{
    int n,r;
    clrscr();
    printf("Enter a number");
    scanf("%d", &n);
    r = reverse(n);
    printf("%d\n",r);
    getch();
}

int reverse(int n)
{
    static long r = 0;
    if(n == 0)
    {
       return 0;
    }
    r = r * 10;
    r = r + n % 10;
    reverse(n/10);
    return r;
}

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To Run Press Ctrl+f9

Output:

     

Find Reminder & Quotient in C - Working Code

#include<stdio.h>
#include<conio.h>
void main()
{
   int dividend, divisor, quotient, remainder;
   clrscr();
   printf("Enter the Dividend: ");
   scanf("%d", &dividend);
   printf("Enter the divisor: ");
   scanf("%d", &divisor);
   quotient = dividend/divisor;
   remainder = dividend%divisor;
   printf("Quotient: %d\n",quotient);
   printf("Remainder: %d",remainder);
   getch();
}


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To Run Press Ctrl+f9

Output:

Find The Given Number is Armstrong in C - Working Code

#include<stdio.h>
#include<conio.h>
void main()
{
   int n, n1, rem, num=0;
   clrscr();
   printf("Enter a positive integer: ");
   scanf("%d", &n);
   n1=n;
   while(n1 != 0)
   {
      rem = n1%10;
      num+=rem*rem*rem;
      n1/=10;
   }
   if(num == n)
   printf("%d is an Armstrong number.",n);
   else
   printf("%d is not an Armstrong number.",n);
   getch();
}

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Output:

Find Remainder Without Modulo operation in C - Working Code

#include<stdio.h>
#include<conio.h>
void main()
{
    int n1, n2, quotient, remainder;
    clrscr();
    printf("Enter two numbers \n");
    scanf("%d%d",&n1,&n2);
    quotient = n1/n2;
    remainder = n1 - quotient * n2;
    printf("%d",remainder);
    getch();
}

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To Run Press Ctrl+f9

Output:

Reverse Number in C - Working Code

#include<stdio.h>
#include<conio.h>
void main()
{
   int n, reverse=0;
   clrscr();
   printf("Enter any 4 numbers to reverse\n");
   scanf("%d", &n);
   while(n != 0)
   {
      reverse = reverse*10;
      reverse = reverse+n%10;
      n = n/10;
   }
   printf("Reverse of entered number is = %d\n",reverse);
   getch();
}

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To Run Press Ctrl+f9

Output: 

String Reverse in C - Working Code

#include<stdio.h>
#include<string.h>
void main()
{
    char str[100], temp;
    int i,j = 0;
    printf("\nEnter the string: ");
    gets(str);
    i = 0;
    j = strlen(str) - 1;
    while(i < j)
    {
       temp = str[i];
       str[i] = str[j];
       str[j] = temp;
       i++;
       j--;
    }
    clrscr();
    printf("\nReverse string is :%s", str);
    getch();
}

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Output: