Thread: Median Help!

Hello,

I have been attempting to calculate a median, and I have been hitting my head against the wall for a while now. I would greatly appreciate a pointer in the right direction. Here is the code I have written so far.

Code:

#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
#include <vector>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <set>

using namespace std;

int main()
{
char z;
float characters=0, dig, di=0, ca=0, cb=0, cc=0, cd=0, ce=0, cf=0, cg=0, ch=0, ci=0, cj=0, ck=0, cl=0, cm=0, cn=0, co=0, cp=0, cq=0, cr=0, cs=0, ct=0, cu=0, cv=0, cw=0, cx=0, cy=0, cz=0;
float a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, zz;
ifstream inData;
FILE *file1;
file1 = fopen("text1.dat", "r");

//counts specific characters and digits
while(!feof(file1))
{
fscanf(file1,"%c",&z);
characters++;
if(z=='A' || z=='a')
{ca++;
a=ca;}
else if(z=='B' || z=='b')
{cb++;
b=cb;}
else if(z=='C' || z=='c')
{cc++;
c=cc;}
else if(z=='D' || z=='d')
{cd++;
d=cd;}
else if(z=='E' || z=='e')
{ce++;
e=ce;}
else if(z=='F' || z=='f')
{cf++;
f=cf;}
else if(z=='G' || z=='g')
{cg++;
g=cg;}
else if(z=='H' || z=='h')
{ch++;
h=ch;}
else if(z=='I' || z=='i')
{ci++;
i=ci;}
else if(z=='J' || z=='j')
{cj++;
j=cj;}
else if(z=='K' || z=='k')
{ck++;
k=ck;}
else if(z=='L' || z=='l')
{cl++;
l=cl;}
else if(z=='M' || z=='m')
{cm++;
m=cm;}
else if(z=='N' || z=='n')
{cn++;
n=cn;}
else if(z=='O' || z=='o')
{co++;
o=co;}
else if(z=='P' || z=='p')
{cp++;
p=co;}
else if(z=='Q' || z=='q')
{cq++;
q=cq;}
else if(z=='R' || z=='r')
{cr++;
r=cr;}
else if(z=='S' || z=='s')
{cs++;
s=cs;}
else if(z=='T' || z=='t')
{ct++;
t=ct;}
else if(z=='U' || z=='u')
{cu++;
u=cu;}
else if(z=='V' || z=='v')
{cv++;
v=cv;}
else if(z=='W' || z=='w')
{cw++;
w=cw;}
else if(z=='X' || z=='x')
{cx++;
x=cx;}
else if(z=='Y' || z=='y')
{cy++;
y=cy;}
else if(z=='Z' || z=='z')
{cz++;
zz=cz;}
else if(z=='0' || z=='1' || z=='2' || z=='3' || z=='4' || z=='5' || z=='6' || z=='7' || z=='8' || z=='9')
{di++;
dig=di;}
}
//checking logic
characters--;
cout << "The letter A occurs " << ca << " times and the ratio to non white space is " << setprecision(3) << (ca/characters) << endl;
cout << "The letter B occurs " << cb << " times and the ratio to non white space is " << setprecision(3) << (cb/characters) << endl;
cout << "The letter C occurs " << cc << " times and the ratio to non white space is " << setprecision(3) << (cc/characters) << endl;
cout << "The letter D occurs " << cd << " times and the ratio to non white space is " << setprecision(3) << (cd/characters) << endl;
cout << "The letter E occurs " << ce << " times and the ratio to non white space is " << setprecision(3) << (ce/characters) << endl;
cout << "The letter F occurs " << cf << " times and the ratio to non white space is " << setprecision(3) << (cf/characters) << endl;
cout << "The letter G occurs " << cg << " times and the ratio to non white space is " << setprecision(3) << (cg/characters) << endl;
cout << "The letter H occurs " << ch << " times and the ratio to non white space is " << setprecision(3) << (ch/characters) << endl;
cout << "The letter I occurs " << ci << " times and the ratio to non white space is " << setprecision(3) << (ci/characters) << endl;
cout << "The letter J occurs " << cj << " times and the ratio to non white space is " << setprecision(3) << (cj/characters) << endl;
cout << "The letter K occurs " << ck << " times and the ratio to non white space is " << setprecision(3) << (ck/characters) << endl;
cout << "The letter L occurs " << cl << " times and the ratio to non white space is " << setprecision(3) << (cl/characters) << endl;
cout << "The letter M occurs " << cm << " times and the ratio to non white space is " << setprecision(3) << (cm/characters) << endl;
cout << "The letter N occurs " << cn << " times and the ratio to non white space is " << setprecision(3) << (cn/characters) << endl;
cout << "The letter O occurs " << co << " times and the ratio to non white space is " << setprecision(3) << (co/characters) << endl;
cout << "The letter P occurs " << cp << " times and the ratio to non white space is " << setprecision(3) << (cp/characters) << endl;
cout << "The letter Q occurs " << cq << " times and the ratio to non white space is " << setprecision(3) << (cq/characters) << endl;
cout << "The letter R occurs " << cr << " times and the ratio to non white space is " << setprecision(3) << (cr/characters) << endl;
cout << "The letter S occurs " << cs << " times and the ratio to non white space is " << setprecision(3) << (cs/characters) << endl;
cout << "The letter T occurs " << ct << " times and the ratio to non white space is " << setprecision(3) << (ct/characters) << endl;
cout << "The letter U occurs " << cu << " times and the ratio to non white space is " << setprecision(3) << (cu/characters) << endl;
cout << "The letter V occurs " << cv << " times and the ratio to non white space is " << setprecision(3) << (cv/characters) << endl;
cout << "The letter W occurs " << cw << " times and the ratio to non white space is " << setprecision(3) << (cw/characters) << endl;
cout << "The letter X occurs " << cx << " times and the ratio to non white space is " << setprecision(3) << (cx/characters) << endl;
cout << "The letter Y occurs " << cy << " times and the ratio to non white space is " << setprecision(3) << (cy/characters) << endl;
cout << "The letter Z occurs " << cz << " times and the ratio to non white space is " << setprecision(3) << (cz/characters) << endl;
cout << "The digits 0-9 occur " << di << " times and the ratio to non white space is " << setprecision(3) << (di/characters) << endl;




//************Below this line is the problem area!*****************
// sort & median
int size;
float array[27]={a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, zz};
int middle = size/2;
float median;
if (size%2==0)
{median = static_cast<float>(array[middle-1]+array[middle])/2;}
else median = static_cast<float>(array[middle]);
cout << "The median of the array is:" << median << endl;
}

Saying

Code:

int size;

does not magically put a value into the variable. Similarly, saying

Code:

float array[27] = {a bunch of things that you really shouldn't have in the first place};

does not magically sort those numbers so that you have them in order.

Originally Posted by tabstop

Saying

Code:

int size;

does not magically put a value into the variable. Similarly, saying

Code:

float array[27] = {a bunch of things that you really shouldn't have in the first place};

does not magically sort those numbers so that you have them in order.

Yeh, did not help with the process of learning the concept. I am having problems understanding the various sort methods, and I was looking for some help with that. I have been reading many forums, many books, and many how-to guides, and I am still having a problem grasping the concept, which is why I brought the code here. The problem with size is something I recognized previously as well, but thank you for pointing it out again so I wont forget it this time.

Well, this is a text-based forum. I don't know what we can give you here that you aren't getting from other text-based forums.

Also, you didn't bring the code here: you brought in an absence of code, which was my point. If you intend to sort, you're going to have to write something to do it. If you really don't know how to sort, sit down with a deck of cards, deal them face down, and work out how to sort that deck in order.