How do you make a C++ histogram?

for the program i need a function that displays a histogram showing the numbers (that the user has given using a vector) in each 5 five unit range (i.e. 1-5,6-10

How do you make a C++ histogram?
The trick to this is using the proper coding structure... a switch statement. A histogram is basically a bar chart that shows relative frequencies (total counts for a given value... how many fives, how many eights etc) so that you can see a distribution of values.





int firstrange = 0;


int secondrange = 0;


int thirdrange = 0;


int howmanyunknowns = 0;





for(int i=0;i %26lt; int_Vector.size(); i++)


{


int d = int_Vector.at(i);





switch (d) {


case 1:


case 2:


case 3:


firstrange++;


break;





case 4:


case 5:


case 6:


secondrange++;


break;





case 7:


case 8:


case 9:


thirdrange++;


break;





default:


howmanyunknowns++;


}





}





The above loop would run through a integer vector looking for 1's, 2's, 3's...etc and count them up, placing them in the correct range variable counter. (Values of 1, 2, 3 go into one variable... firstrange)





At the end you would have a count of each range for displaying as you like.





Granted this switch statement can only handle a limited set of ranges, but if you need more and bigger ranges, remember you can write a switch statement into a series of if statements...





if ((x %26gt;=1) %26amp;%26amp; (x %26lt;= 20)) { firstrange++; }


if ((x %26gt;=21) %26amp;%26amp; (x %26lt;= 40)) { secondrange++; }





etc etc etc.





Side Note: You could use a vector iterator instead of a for loop. I just used one to make it a bit more simple looking.





Hope you get the idea.