study notes

After I wrote assignment1, I felt that the io_display function written by Fardad is a really good study example, because when I first wrote displayflag, I wrote more than 30 lines of code to handle spaces and try to move the cursor around. After I walked though io_display function, I found Fardad used only two for loops with a few lines and did what my 30 lines did. So, I changed my displayflag function and called io_display inside.

This is my displayflag function final copy,

void io_displayflag(const char *format, int row, int col, int status) {

      char format2[4];

      strcpy (format2, format);

      if (status == 0){

            //display unchecked

            format2[1] = ' ';

      }

      io_display(format2, row, col, 4);

      io_move(row, col+1);

}


This is the display function written by Fardad,

void io_display(const char *str, int row, int col, int len){

  io_move(row, col);

  if(len <= 0){

    io_putstr(str);

  }

  else{

    int i;

    for(i=0;i < len && str[i];i++){

      io_putch(str[i]);

    }

    for(;i < len;i++){

      io_putch(' ');

    }