How can I calculate divide and modulo for integers in C

Question

How can I calculate division and modulo for integer numbers in C

User · Answer

Division is performed using the   operator   result   a   b    Modulo division is done using the   operator   result   a   b

User · Answer

Fun fact   The  modulus  operation is defined as   a   n    gt  a -  a n    n   Ref Modular Arithmetic  So you could roll your own  although it will be FAR slower than the built in   operator   public static int Mod int a  int n        return a -  int   double a   n    n      Edit  wow  misspoke rather badly here originally  thanks  joren for catching me  Now here I m relying on the fact that division   cast-to-int in C  is equivalent to Math Floor  i e   it drops the fraction   but a  true  implementation would instead be something like   public static int Mod int a  int n        return a -  int Math Floor  double a   n    n      In fact  you can see the differences between   and  true modulus  with the following   var modTest       from a in Enumerable Range -3  6      from b in Enumerable Range -3  6      where b    0     let op    a   b      let mod   Mod a b      let areSame   op    mod     select new                 A   a          B   b          Operator   op           Mod   mod           Same   areSame        Console WriteLine  A      B     A B   Mod A B    Equal     Console WriteLine  -----------------------------------    foreach  var result in modTest        Console WriteLine            0 -3     1 -3     2 -5     3 -10     4 -6             result A          result B          result Operator           result Mod           result Same       Results   A      B     A B   Mod A B    Equal  ----------------------------------- -3    -3    0       0            True   -3    -2    -1      -1           True   -3    -1    0       0            True   -3    1     0       0            True   -3    2     -1      1            False  -2    -3    -2      -2           True   -2    -2    0       0            True   -2    -1    0       0            True   -2    1     0       0            True   -2    2     0       0            True   -1    -3    -1      -1           True   -1    -2    -1      -1           True   -1    -1    0       0            True   -1    1     0       0            True   -1    2     -1      1            False  0     -3    0       0            True   0     -2    0       0            True   0     -1    0       0            True   0     1     0       0            True   0     2     0       0            True   1     -3    1       -2           False  1     -2    1       -1           False  1     -1    0       0            True   1     1     0       0            True   1     2     1       1            True   2     -3    2       -1           False  2     -2    0       0            True   2     -1    0       0            True   2     1     0       0            True   2     2     0       0            True

User · Answer

Read two integers from the user  Then compute display the remainder and quotient      When the larger integer is divided by the smaller integer Console WriteLine  Enter integer 1 please      double a5   double Parse Console ReadLine     Console WriteLine  Enter integer 2 please      double b5   double Parse Console ReadLine      double div   a5   b5  Console WriteLine div    double mod   a5   b5  Console WriteLine mod    Console ReadLine

User · Answer

Before asking questions of this kind  please check MSDN documentation      When you divide two integers  the result is always an integer  For example  the result of 7   3 is 2  To determine the remainder of 7   3  use the remainder operator        int a   5  int b   3   int div   a   b    quotient is 1 int mod   a   b    remainder is 2

User · Answer

There is also Math DivRem  quotient   Math DivRem dividend  divisor  out remainder

[c#] How can I calculate divide and modulo for integers in C#?

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