HW10
COP-3223H

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1. (hw10-1.c) Hand-copy yourself without copy-and-paste the following program into a file on eustis and compile and run it.

   #include <stdio.h>
   #include <unistd.h>
   
   int main(int argc, char **argv) {
     int width = 40;
     int height = 20;
     int x = 1;
     int y = 1;
     int dx = 1;
     int dy = 1;
     while (1) {
       printf("\033[2J");
       printf("\033[H");
       printf("\033[%d;%dH", y, x);
       putchar('o');
       fflush(stdout);
       if ((0 < (x + dx)) && ((x + dx) <= width)) {
         dx = dx;
       } else {
         dx = dx * -1;
       }
       if ((0 < (y + dy)) && ((y + dy) <= height)) {
         dy = dy;
       } else {
         dy = dy * -1;
       }
       printf("\033[%d;%dH", height + 2, 0);
       printf("y: %d\n", y);
       printf("x: %d\n", x);
       x = x + dx;
       y = y + dy;
       usleep(50 * 1000);
     }
     return 0;
   }
   

2. (hw10-2.c) Write a program, using either the ANSI cursor movements shown in class or nested while loops, that draws a diagonal "line" of character o from terminal position (0,0) to (10,10) exclusive. The output should look like this:

   o
    o
     o
      o
       o
        o
         o
          o
           o