Guess-a-number example; make echo run on PC-88

examples/README.md

@@ -2,14 +2,16 @@
 
 ## Cross-platform examples
 
-* [Hello world](crossplatform/hello_world.mfk) (C64/C16/PET/VIC-20/Atari/Apple II/BBC Micro/ZX Spectrum/PC-88/Armstrad CPC) – simple text output
+* [Hello world](crossplatform/hello_world.mfk) (C64/C16/PET/VIC-20/PET/Atari/Apple II/BBC Micro/ZX Spectrum/PC-88/Armstrad CPC) – simple text output
 
 * [Text encodings](crossplatform/text_encodings.mfk) (C64/ZX Spectrum) – examples of text encoding features
 
-* [Echo](crossplatform/echo.mfk) (C64/C16/ZX Spectrum)– simple text input and output
+* [Echo](crossplatform/echo.mfk) (C64/C16/ZX Spectrum/PC-88)– simple text input and output
 
 * [Calculator](crossplatform/calculator.mfk) (C64/C16/ZX Spectrum/PC-88) – simple numeric input and output
 
+* [Guessing game](crossplatform/guess.mfk) (C64/C16/ZX Spectrum/PC-88) – a guess-a-number game
+
 * [Fire effect](crossplatform/fire.mfk) (C64/C16/ZX Spectrum) – a simple fire effect
 
 * [Bell](crossplatform/bell.mfk) (Apple II/ZX Spectrum) – a program that goes \*ding!\*

examples/crossplatform/echo.mfk

@@ -3,7 +3,7 @@
     import c64_basic
 #elseif CBM_264
     import c264_basic
-#elseif ZX_SPECTRUM
+#elseif ZX_SPECTRUM || NEC_PC_88
     // no imports needed
 #else
     #error Unsupported platform
@@ -12,11 +12,12 @@
 import stdio
 
 void main() {
+    pointer line
     while true {
-        readline()
+        line = readline()
         // empty line is read as a single space
-        if readline_out[0] == 32 && readline_out[1] == 0 { return }
-        putstrz(readline_out)
-        putchar(13)
+        if line[0] == 32 && line[1] == 0 { return }
+        putstrz(line)
+        new_line()
     }
 }

examples/crossplatform/guess.mfk

@@ -0,0 +1,64 @@
+import random
+import stdio
+import err
+
+#if CBM_64
+import c64_basic
+#endif
+
+#if CBM_264
+import c264_basic
+#endif
+
+void main () {
+    init_rand_seed()
+    ensure_mixedcase()
+    putstrz("Welcome to the guessing game."z)
+    new_line()
+    while true {
+        play_round()
+    }
+
+}
+
+void play_round() {
+    word guess
+    word answer
+    word guess_count
+    do {
+        answer.hi = rand()
+        answer.lo = rand()
+    } while answer > 999
+    answer += 1
+    guess_count = 0
+
+    putstrz("I picked a number between 1 and 1000."z)
+    new_line()
+    while true {
+        putstrz("Your guess?"z)
+        new_line()
+        guess = readword()
+        while errno != err_ok {
+            putstrz("That wasn't a number! Try again."z)
+            new_line()
+            guess = readword()
+        }
+        guess_count += 1
+        if guess == answer { break }
+        if answer < guess {
+            putstrz("My number is smaller!"z)
+            new_line()
+        }
+        if answer > guess {
+            putstrz("My number is bigger!"z)
+            new_line()
+        }
+    }
+    putstrz("Congratulations! You guessed my number!"z)
+    new_line()
+    putstrz("It took you only "z)
+    putword(guess_count)
+    putstrz(" attempts!"z)
+    new_line()
+    new_line()
+}