add: tests for zero-parser.

sysy_sets/73_int_io.sy

@@ -0,0 +1,52 @@
+const int ascii_0 = 48;
+
+int my_getint()
+{
+    int sum = 0, c;
+
+    while (1) {
+        c = getch() - ascii_0;
+        if (c < 0 || c > 9) {
+            continue;
+        } else {
+            break;
+        }
+    }
+    sum = c;
+
+    while (1) {
+        c = getch() - ascii_0;
+        if (c >= 0 && c <= 9) {
+            sum = sum * 10 + c;
+        } else {
+            break;
+        }
+    }
+
+    return sum;
+}
+
+void my_putint(int a)
+{
+    int b[16], i = 0;
+    while (a > 0) {
+        b[i] = a % 10 + ascii_0;
+        a = a / 10;
+        i = i + 1;
+    }
+    while (i > 0) {
+        i = i - 1;
+        putch(b[i]);
+    }
+}
+
+int main()
+{
+    int n = my_getint();
+    while (n > 0) {
+        int m = my_getint();
+        my_putint(m); putch(10);
+        n = n - 1;
+    }
+    return 0;
+}