Unexpected result after printing a string in c

The code is –

#include <stdio.h>
#include <stdlib.h>

int main()
{
    FILE *filevar;
    filevar = fopen("file", "r");
    char copy [100];
    int i = 0;

    while(1)
    {
        char ch = fgetc(filevar);
        if(ch==EOF)
        {
            break;
        }
        copy[i] = ch;
        i++;
    }
    printf("\n%s", copy);
    fclose(filevar);
    return 0;
}

When I run it the out put I get is

textblabla■a

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file content is –

textblabla

Changing the file content changes the random charecters at end

>Solution :

Two main issues.

1. ch has to be int
2. You do not null character terminate the string

        int ch = fgetc(filevar);
        if(ch==EOF)
        {
            copy[i] = 0;
            break;
        }
        
        copy[i] = ch;
        i++;