Better error messagesch30

Better error messages.
Buffs to the std lib; getch() to fetch a single character; streaming I/O handles retries, and large sizes, with better error reporting.
Formatted strings.
Default int moved to i32.
TicTacToe, the game.

1 files changed, 38 insertions, 0 deletions

diff --git a/chapter30/docs/examples/BubbleSort.smp b/chapter30/docs/examples/BubbleSort.smp
new file mode 100644
index 00000000..6bdb13a9
--- /dev/null
+++ b/chapter30/docs/examples/BubbleSort.smp
@@ -0,0 +1,38 @@
+
+// An implementation of
+// https://sampleprograms.io/projects/bubble-sort/
+//
+// Bubble sort, with reading (parsing) and writing (formatting) the data.
+
+val sort = { !sys.aryi64 nums ->
+    sys.aryi64?! more = nums;
+    while( more ) {
+        more = null;
+        for( u32 i = 0; i < nums.len-1; i++ )
+            if( nums.buf[i] > nums.buf[i+1] ) {
+                u32 next = i+1;
+                more = nums.swap(i,next);
+            }
+    }
+};
+
+// Read one process argument of the form "[ 4, 3, 2, 1]" and print it sorted.
+// args[0] is the executable name, as with native C argc/argv.
+val main = { u8[~][] args ->
+    val usage = { ->
+        sys.io.p("Usage: please provide a list of at least two integers to sort in the format \"[1, 2, 3, 4, 5]\"\n");
+        return 0;
+    };
+    if( args# != 2 ) return usage();
+
+    var nums = sys.aryi64.parseAryI64(args[1]);
+    if( !nums ) return usage();
+    if( nums.len < 2 ) return usage();
+
+    // Bubble sort array of integers
+    sort(nums);
+
+    // Print the same bracketed array-list format accepted as input.
+    nums.str().add('\n').write(1);
+    return 0;
+};