How does the modulus operator work

Question

Let s say that I need to format the output of an array to display a fixed number of elements per line  How do I go about doing that using modulus operation   Using C    the code below works for displaying 6 elements per line but I have no idea how and why it works   for   count   0   count  lt  size   count          cout  lt  lt  somearray count       if  count   6    5  cout  lt  lt  endl      What if I want to display 5 elements per line  How do i find the exact expression needed

User · Answer

Basically modulus Operator gives you remainder simple Example in maths what's left over/remainder of 11 divided by 3? answer is 2

for same thing C++ has modulus operator ('%')

Basic code for explanation

#include <iostream>
using namespace std;


int main()
{
    int num = 11;
    cout << "remainder is " << (num % 3) << endl;

    return 0;
}

Which will display

remainder is 2

User · Answer

It gives you the remainder of a division   int c 11  d 5  cout  lt  lt   c d    d   c   d     gives you the value of c

User · Answer

You can think of the modulus operator as giving you a remainder  count   6 divides 6 out of count as many times as it can and gives you a remainder from 0 to 5  These are all the possible remainders because you already divided out 6 as many times as you can   The elements of the array are all printed in the for loop  but every time the remainder is 5  every 6th element   it outputs a newline character  This gives you 6 elements per line  For 5 elements per line  use      if  count   5    4

User · Answer

in C   expression a   b returns remainder of division of a by b  if they are positive  For negative numbers sign of result is implementation defined   For example   5   2   1 13   5   3   With this knowledge we can try to understand your code  Condition count   6    5 means that newline will be written when remainder of division count by 6 is five  How often does that happen  Exactly 6 lines apart  excercise   write numbers 1  30 and underline the ones that satisfy this condition   starting at 6-th line  count   5    To get desired behaviour from your code  you should change condition to count   5    4  what will give you newline every 5 lines  starting at 5-th line  count   4

User · Answer

This JSFiddle project could help you to understand how modulus work  http   jsfiddle net elazar170 7hhnagrj  The modulus function works something like this        function modulus x y          var m   Math floor x   y          var r   m   y         return x - r

[c++] How does the modulus operator work?

Examples related to c++

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