Question

Here’s my code:

FILE* fp,*check;
fp=fopen("file.txt","r");
check=fp;
char polyStr[10];
while(fgetc(check)!='\n')
{
    fscanf(fp,"%s",polyStr);
    puts(polyStr);
    check=fp;
}
while(fgetc(check)!=EOF)
{
    fscanf(fp,"%s",polyStr);
    puts(polyStr);
    check=fp;
}

Now if my file.txt is:

3,3, 4,4, 5,5
4,1, 5,5, 12,2

Now output is:

,3,
4,4,
5,5,
,1,
5,5,
12,2,

Now why is the first character of both the lines not getting read?

Answer 1

Your fgetc call is eating the character.

You should read entire lines with fgets and then parse them with the strtol family. You should never use any of the *scanf functions.