How do I insert value between table[0] and table [1]?

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Hi friends
I want do edit my program in c language for insert a new value in the first of table , this is my original program and a comment what I tried !
My program will be like that :
Moins val = 0
Plus val = 1
-----------
Moins 0 = val
Plus 0 = 2
----------
Moins 1 = 2
Plus 1 = 3
.
.
.
Moins 255 = 256
Plus 255 = 257
It means new insert char val between interval 0 and 1
Char of zero between range 1 and 2
Char of 1 between range 2 and 3
Char of 2 between range 3 and 4

What I have tried:

#define plus(c)       (c+1)
#define moins(c)      (c)

Int main ()
{
    Int arrayCount[256];//number of ascii code
    Int range[plus(256)];//table of all ascii counted
    Int c;
    For (c=0;c<256;c++)
    {
        ArrayCount[c]=0;
    }
    While (c=fgetc(file))//file is opened with image grey scale
    {
        ArrayCount[c]++;
    }

    Moy[0]=0;
//  Moy[1]=tab[257];
    For(c=0;c<=257;c++)
    {
        Range[plus(c)]=tab[c];
    }
    For(c=1;c<=257;c++)
    {
        Range[c]=range[c]+range[c-1];

Posted 17-Nov-17 10:50am

yagami_md

Updated 19-Nov-17 14:06pm

v4

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Comments

Rick York 17-Nov-17 18:07pm

I think you omitted some of your code there.

This has lots of problems. You have arrays of size 256 and you are accessing item 257 in it. In the C language, the indexes of those array will range from 0 to 255, or one less than their capacity since they start at zero. I always make a "magic" value like that into a const value in C++ or a definition C. An example is :

#define ArraySize 256

int range[ArraySize];
// using it in a loop :
for( c = 0; c < ArraySize; ++c )
{
range[c] = 0;
}

yagami_md 18-Nov-17 5:53am

Your solution is only what I did for counted the all char in the file but in the table headcOunt[]
My problem is how I insert a new symbol(char) before the 0 symbol and try to insert the symbol in the range[] table and the range of the symbol will be between the range[0] and range[1]
It means range[plus(val)]=1
Range [moins(val)]=0

Richard MacCutchan 18-Nov-17 6:40am

That is certainly strange looking C code: reserved (and other) words starting with capital letters.

yagami_md 18-Nov-17 7:18am

How I can I do it??

Richard MacCutchan 18-Nov-17 12:07pm

I am not sure I understand the question. I certainly don't understand the code.

Iqra Ali 19-Nov-17 14:54pm

To append something in between 0 and 1, you need to make that something a "1" and then 1 will be 2. Can you share what is not working?

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KarstenK · Accepted Answer · 2017-11-19T06:37:00

Solution 1

In C you must allocate a new and big enough array and copy all needed values. A nice Youtube tutorial.

In C++ you could use a vector or some other classes which support changeable arrays.

Posted 19-Nov-17 6:37am

KarstenK

Rick York · Accepted Answer · 2017-11-19T14:06:00

Solution 2

Here is one way to move an array down and insert a new value :

C++

#define ArraySize 256
int range[ArraySize];
memmove( &range[2], &range[1], sizeof(int)*( ArraySize-2 ) );
range[1] = newValue;

Posted 19-Nov-17 14:06pm

Rick York

Updated 19-Nov-17 14:07pm

v2