I have a runtime error that I cant figure out

the runtime error I get is

Run-Time Check Failure #2 - Stack around the variable 'chChount' was corrupted.

I cant see anything wrong with what I am doing here can you?

here is my code


#include <iostream>
#include <string>
#include <fstream>
using namespace std;
int main()
{
ifstream infile;
string buffer;
char chbuf;

long chCount[256]= {0};
//memset(chCount, 0, 256 * sizeof(int));

cout<<"please entere a filename to analyze: ";
getline(cin, buffer);
infile.open(buffer.c_str(), ios::in);

if(infile.is_open())
{
while(!infile.eof())
{

chbuf = infile.get();

chCount[chbuf]++;
}

for(int i =0;i<256;i++)
{
if(chCount[i] != 0)
{
cout<<char(i)<<": "<<chCount[i]<<endl;
}
}

infile.close();
}
return 0;
}

Logical Flaw in your code at the point where you have written stmt.



Here you are incrementing array chcount ( i.e trying to change the address of array. This is not allowed with an array.

Secondly, i presume you are trying to count characters.Then also
chBuf ( though act like an integer) but can give error.

Do chCount[chbuf++] instead.

would that really increment the array aelement int the chbuf location?

I may be wrong but it looks to me that it would simply call teh the chbuf + 1 element in chCount array then do nothing with that element.

What I want to do is increment the integer located in the chCount[chbuf] location

I dont understand why this causes a problem. an array is just a pointer to data. why cant I increment the data at that location?

I figured it out.

The problem is that I wasn't checking to make sure that the data I pulled from the file was an array. when I tried to access the chbuf location of a size 256 array and chbuf > 256 well that is a problem isn't it. hehe

but my method of incrementing the worked ok.

An Array though a pointer is different from a normal pointer in that it is a constant pointer with fixed address assigned to it during compile time.In case of normal pointer address can be changed using ncrement operator.

I hink you are right.Sorry, I was mistaken.
It will increment the elelemnt pointed to by that position in the array.