how to print a dollar sign at the end of each in in C

Question

while (fgets(line, LINELEN, inputFile)){
      printf("%s$", line)
}

I am trying to read a file and print it out to the console as a CAT command. In this case I wanted to put a dollar sign at the end of every line, but the dollar sigh just happened to print out at the beginning of every line. Could you guys show me how to fix this. Thanks a lot!

score 2 · Accepted Answer · answered Oct 08 '14 at 04:02

fgets includes the '\n' at the end of the line.

Use something like:

char line[hopefullybigenough];
while (fgets(line, sizeof(line), inputFile)) {
    size_t len = strlen(line);
    if (line[len - 1] == '\n') line[len - 1] = '\0';
    printf("%s$\n", line);
}

score 1 · Answer 2 · edited May 23 '17 at 12:27

1

The fgets command stores the newline that it read. The usual solution would be to remove the newline (there are several ways to do this of course) . Here is one way:

while (fgets(line, LINELEN, inputFile)) 
{
    strtok(line, "\n");
    printf("%s$\n", line);
}

edited May 23 '17 at 12:27

Community

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answered Oct 08 '14 at 04:00

M.M

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Note that `strtok` is not reentrant or threadsafe. – o11c Oct 08 '14 at 04:03
Nor does `strtok` even work here. http://ideone.com/yLHmuC – indiv Oct 08 '14 at 04:17
for my case, it doest work :( – stanlopfer Oct 08 '14 at 04:21
@stanlopfer be more specific? – M.M Oct 08 '14 at 06:19

how to print a dollar sign at the end of each in in C

2 Answers2