Question

I have a C array called buf. Here is it’s definition:

char buf[1024];

Now, my current code takes from stdin and uses fgets() to set that array, however I wish to use code to set it instead. Right now the line that sets buf looks like this:

fgets(buf, 1024, stdin);

Basically, I want to replace stdin, with say… “My String”. What’s the best way to do this?

Answer 1

Look for sprintf, for example here: Cpp reference

Edit:

sprintf(buf, "My string with args %d", (long) my_double_variable);

Edit 2:

As suggested to avoid overflow (but this one is standard C) you can use snprintf.