## INDEX

### Write a c program to subtract two numbers without using subtraction operator

Write a c program or code to subtract two numbers without using subtraction operator

#include<stdio.h>

int main(){

int a,b;
int sum;

printf("Enter any two integers: ");
scanf("%d%d",&a,&b);

sum = a + ~b + 1;

printf("Difference of two integers: %d",sum);

return 0;
}

Sample Output:

Enter any two integers: 5 4
Difference of two integers: 1

1. write a c program to display all even factors of a given number using function in c

2. can u give me a program in c to calculate the series 1+4+25+........+n using double loops

3. how is it possible solution of above example question
sum=a+~b+1

1. i think that is wrong ..it should be a+~b-1

4. I don't understand.

5. This comment has been removed by the author.

6. what is ~?

1. ~ is complement operator.
if a=8 then a=1000(in binary form)
and when we take ~a it becomes=0111(interchange 0's and1's)
now 0001=7
in the above example we have to do (a-b)
a-b= a+(-b)
=a+(~b+1)=a+~b+1

2. but a & b are integers, how does it convert them to binary form, calculate 2's compliment and return result back in int form???

3. but a & b are integers, how does it convert them to binary form, calculate 2's compliment and return result back in int form???

7. #include

int main(){

int a,b,i;

printf("Enter any two integers: ");
scanf("%d%d",&a,&b);
for( i=0;i<b;i++)
{
a--;
}

printf("Sum of two integers: %d",a);

return 0;
}

8. #include

int main(){

int a,b,i;

printf("Enter any two integers: ");
scanf("%d%d",&a,&b);
for( i=0;i<b;i++)
{
a--;
}

printf("Sum of two integers: %d",a);

return 0;
}

9. Why did we write int on the line 1 (i.e.,into main())

10. Why did we write int on the line 1 (i.e.,into main())

11. will it work for a=10,b=5
coz binary value of a=1010,b=101,~b=010
so sum=1010+010+1
=1101 which 13 in decimal