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# 1  
Old 04-18-2008
I can print ""
I'm trying to print an xml header to a file and I don't know how

the last thing I tried is this:

system("echo '<?xml version='\"1.0\"' encoding='\"UTF-8\"'?>'" > a.xml)

"" are not printed

The code is written in C/C++
# 2  
Old 04-18-2008
Escape " with \

Code:
echo \"hai\"

will print "hai"
# 3  
Old 04-18-2008
Oops..
Sorry, misread your question. Didn't notice you had already escaped "
# 4  
Old 04-18-2008
Can I ask why you are using the system call from C to write to a file in the first place? You do realize that there exists a slew of API calls that are much more efficient than creating a new process to write a single line of text to a file.

Code:
FILE *fp;

fp = fopen("a.xml", "wt");
fprintf(fp, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
fclose(fp);

Would be much better and you can even continuing writing XML to file instead of closing it.
# 5  
Old 04-24-2008
you were having a mismatch of single quotes. I am able to write a.xml by following call.
system("echo '<?xml version=\"1.0\" encoding=\"UTF-8\"?>' > a.xml;");
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