C compiling / error: stray ‘\’ in program

Dear all,

I have a problem with compiling my program. I need to write to a file sequence of symbols. But there is a problem with symbol "\".


making_python_files.c:31: error: stray ‘\’ in program
making_python_files.c:31: error: expected ‘)’ before ‘n’
making_python_files.c:32: error: invalid operands to binary % (have ‘char *’ and ‘float’)
making_python_files.c:32: error: expected ‘)’ before string constant
making_python_files.c:32: warning: format not a string literal and no format arguments

The error massages concern line with fpriptf command below.
I will be very grateful for any advises.


insert

Code:

main(void)
{
  
  FILE *fp;

        fp=fopen(filename,"w");
 
	   fprintf(fp,"print "\n".join(map(lambda x:");
	   fprintf(fp,""%.6f %.6f %.6f %.6f %.6f %.6f" % tuple(x), molsystem.conf[molname]))");	   
   
       
       fclose(fp);
}

Code:

	   fprintf(fp,"print "\n".join(map(lambda x:");
	   fprintf(fp,""%.6f %.6f %.6f %.6f %.6f %.6f" % tuple(x), molsystem.conf[molname]))");

Stray " in your code is marked with red.
If you want to insert a " into a string, use \".
And main shall return int.

Dear Elysia,

Thanks a lot for the prompt reply. I did what you said, and it compiles now. But it does not do what I really need.
In line below it executes \n (makes a new line) instead of typing this symbol "\n" to a file.
insert

Code:

fprintf(fp,"print \"\n\"");

It also does not print sequence %.6f %.6f %.6f %.6f %.6f %.6f properly. The program expects variables of corresponding types and writes some strange numbers instead.

Originally Posted by Elya

In line below it executes \n (makes a new line) instead of typing this symbol "\n" to a file.
insert

Code:

fprintf(fp,"print \"\n\"");

I'm not sure what you mean or expect here.
print "
"
Should be written to the file with the above code.

It also does not print sequence %.6f %.6f %.6f %.6f %.6f %.6f properly. The program expects variables of corresponding types and writes some strange numbers instead.

True, this is because you use fprintf. They are formatting stuff.
If you need to write that to the file as a string, you can use fputs, or you can do %% to print a % to the file.

Dear Elysia,

Thank you so much for your help! All problems solved.

Elya

To print the following to a file:

\n

You need the following printf:

Code:

printf ("\\n");

QuantumPete