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Edit summary for version 7 :

Version 6

Version 7

Idiom #59 Write to standard error stream

Print the message "x is negative" to standard error (stderr), with integer x value substitution (e.g. "-2 is negative").

Idiom #59 Write to standard error stream

Print the message "x is negative" to standard error (stderr), with integer x value substitution (e.g. "-2 is negative").

Imports
#include <stdio.h>
Code
fprintf(stderr,"%d is negative",x);