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Full Discussion: getline to read input from a user
Top Forums UNIX for Dummies Questions & Answers getline to read input from a user Post 302238950 by jim mcnamara on Monday 22nd of September 2008 11:55:57 AM
Old 09-22-2008
getline is C++ code, this looks like C. The C call that is like getline is fgets.
Another more general point - read is a system API call, so you should reconsider it's use as a variable name.

What you want is stdin, that is the name of the standard input device stream in C if you use fgets. fgets(char *buf, size_tn, streams *stdin).

cin.getline(char *, streamsize n) is the way do the same thing in C++.

len should be a number larger than zero, typically the number of bytes of storage in your line variable. char *line should have memory allocated to it.

This advice is not going to help until you go either in a C direction or a C++ direction.
 

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LEARN ABOUT MINIX

gets

GETS(3) 						     Library Functions Manual							   GETS(3)

NAME

       gets, fgets - get a string from a stream

SYNOPSIS

       #include <stdio.h>

       char *gets(char *s)
       char *fgets(char *s, int n, FILE *stream)

DESCRIPTION

       Gets  reads  a string into s from the standard input stream stdin.  The string is terminated by a newline character, which is replaced in s
       by a null character.  Gets returns its argument.

       Fgets reads n-1 characters, or up through a newline character, whichever comes first, from the stream into the string s.  The last  charac-
       ter read into s is followed by a null character.  Fgets returns its first argument.

SEE ALSO

       puts(3), getc(3), scanf(3), fread(3), ferror(3).

DIAGNOSTICS

       Gets and fgets return the constant pointer NULL upon end of file or error.

BUGS

       Gets deletes a newline, fgets keeps it, all in the name of backward compatibility.

       Gets is not present in the Minix-vmd C library for reasons that should be obvious.  Use fgets instead.

7th Edition							   May 15, 1985 							   GETS(3)
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