How to write a full string to a file?

I'm programming in Windows right now, but portable code would be welcomed too.

What I'm using right now is fwrite(4), but this function needs a maximum number of elements to be wri开发者_JAVA百科tten to the file. I can use strlen(1) here but I'd like to know if there is any better way to do this.

Use fputs instead:

FILE * f = fopen( "myfile.txt", "w" );
fputs( "Hello world\n", f );

You can use fputs, but using functions that require the size to be written are safer (buffer overrun).

So, IMHO, using fwrite would be the preferred choice.

You might check for a null within the expected length first.