Hi,
I was working on something when I noticed that the following code produced a duplicate char before reaching at the end of the file if it had a blank line (with no chars at the file) before the end of the file and without it, it would run file.
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int ReadFromFile(int argc, char **argv)
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{
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// our file pointer, initialized at NULL
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FILE *fStream = NULL;
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char buf[10];
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char p;
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int i = 0;
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if( (fStream = fopen(argv[1], "r")) == NULL )
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{
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// error, return the function
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return FALSE;
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}
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while( !feof( fStream ) )
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{
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fscanf(fStream, "%c", &p);
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if(p != '\n')
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{
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buf[i] = p;
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i++;
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}else {
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buf[i] = '\0';
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i = 0;
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}
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printf("%c", p);
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}
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return TRUE;
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}
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The input file has the following lines
lol
asdf
mmd
(here was the blank line)
the output was:
lol
asdf
mmdd
if the blank line was present, when it didn't have that line the output was
lol
asdf
mmd
Why does this happen I have an idea but I've tried to make a workaround and came at a dead end... Any help?
Update: found a workaround but still I can't explain to myself why the above code fails to provide the output I like... The workaround is the following code
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int ReadFromFile(int argc, char **argv)
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{
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// our file pointer, initialized at NULL
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FILE *fStream = NULL;
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char strBuf[20];
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char intBuf[10];
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char p;
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int i = 0, j = 0;
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if( (fStream = fopen(argv[1], "r")) == NULL )
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{
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// error, return the function
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return FALSE;
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}
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do
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{
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p = fgetc(fStream);
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strBuf[i] = p;
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i++;
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if(p == '\n' || p == EOF)
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{
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strBuf[i-1] = '\0';
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i = 0;
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}
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}while( !feof(fStream) );
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return TRUE;
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}
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I am sure the problem lies with fscanf but I can't figure why this is happening...
