C Program to Add two numbers without using arithmetic Operators

C Program to Add two numbers without using arithmetic Operators

Program 1 : Using Recursive Function

#include<stdio.h>

int add(int, int);

int main()

{

   int num1, num2; 

   printf("\n ");

   scanf("%d %d", &num1, &num2); 

   printf("\nAddition of two number is : %d", add(num1, num2));

   return (0);

}

int add(int num1, int num2)

{

   if (!num1)

      return num2;

   else

      return add((num1 & num2) << 1, num1 ^ num2);

}
Output: 
Enter the two Numbers : 12 43
Addition of two number is : 55

program 2 : Using While Loop

 #include<stdio.h>

int main() {

   int num1 = 20, num2 = 8, i;

   while (num2 > 0) {

      num1++;

      num2--;

   }

   printf("%d", num1);

   return (0);

}

Output: 

Sum is :28

program 3 : Using While Loop

  #include<stdio.h>

int main() {

    int num1 = 20, num2 = 8, i;

    while (num2--) {

        num1++;

    }

    printf("Sum is : %d", num1);

    return (0);

}

Output: 
Sum is :28

program 4 : Using for Loop

  #include<stdio.h>

int sum(int, int);

int main() {

   int a, b;

   printf("Enter the two Numbers: ");

   scanf("%d %d", &a, &b);

   printf("Addition of two number is : %d", add(a, b));

   return(0);

}

int add(int num1, int num2) {

   int i;

   for (i = 0; i < num2; i++)

      num1++;

   return num1;

}

Output
 Enter the two Numbers:32 45

Addition of two number is :77