Please answer this

[bhuvanaa]

i want to add 2 four digit numbers using modulo 10 addition. One of the number will going to get using Random function(only 4 digits). I want to know how to get the random number and perform Modulo 10 Addition.

1234
6789 (this number is created by random function)
--------------
7913
------------

[risby]

i want to add 2 four digit numbers using modulo 10 addition. One of the number will going to get using Random function(only 4 digits). I want to know how to get the random number and perform Modulo 10 Addition.

1234
6789 (this number is created by random function)
--------------
7913
------------

the c library includes functions rand and srand. use srand to set the seed of a sequence of psuedo-random numbers and rand to get the next value from the sequence.

modulo 10 arithmetic means that when you add two digits if the result is greater than 9 subtract 10. From your example above: 4 + 9 = 3 and 8 + 3 = 1.

[Banfa]

You can use the % operator to help you with modulo arithmatic, it is the modulo operator, it gives the remainder when 1 integer is divided by another

4 + 9 = 13

(4 + 9) % 10 = 3

[D_C]

Addition/subtraction without carry is the same thing as XOR. However, since XOR and computer arithmetic is in binary, it doesn't quite churn out the same result for decimal. However, if you used a base like 8 or 16 (or any power of two) it should come out correct.