21
edits
Changes
→int io_flag(..........)
<big>int io_flag(const char *format, int row, int col, int* status, int radio);</big>
io_flag() allows the user to make a single true/false selection. "status" points to the status of the selection, that can be zero or non-zero. If "status" is initially set to anything but zero, io_flag() corrects value to one. "format" holds the shape of the checkbox as io_displayflag() function.
io_flag() begins the selection by displaying the checkbox according to its “*status”. (Remember that the value of "*status" is corrected before the editing begins). Then the function waits for the user input.
If the user input is any of the printable keys (' ' < key <= '~') excluding space, it should be ignored (no action taken). If the user input is any of the function keys, the function is terminated returning the key.
*If the user input is SPACE:<br />If “radio” is true, then the *status is set to one, checkbox is displayed and function is terminated returning space.
*If “radio” is false, then the value of *status is toggled between 0 and 1, the checkbox is displayed and function is exited returning space.