In C, printing to standard output (stdout) is easy, with printf
from stdio.h
.
However, how can I print to standard error (stderr)? We can use fprintf
to achieve it apparently, but its syntax seems strange. Maybe we can use printf
to print to standard error?
The syntax is almost the same as printf
. With printf
you give the string format and its contents ie:
printf("my %s has %d chars\n", "string format", 30);
With fprintf
it is the same, except now you are also specifying the place to print to:
FILE *myFile;
...
fprintf(myFile, "my %s has %d chars\n", "string format", 30);
Or in your case:
fprintf(stderr, "my %s has %d chars\n", "string format", 30);