5 files changed, 43 insertions, 0 deletions
diff --git a/21_read_rec1/.gitignore b/21_read_rec1/.gitignore
new file mode 100644
index 0000000..08001c7
--- /dev/null
+++ b/21_read_rec1/.gitignore
@@ -0,0 +1,2 @@
+test
+Makefile
diff --git a/21_read_rec1/README b/21_read_rec1/README
new file mode 100644
index 0000000..bebd9b8
--- /dev/null
+++ b/21_read_rec1/README
@@ -0,0 +1,4 @@
+Execute the code in test.c (by hand).  Write the resulting output in a file
+called "answer.txt".  
+
+Check your work, and submit as usual.
diff --git a/21_read_rec1/answer.txt b/21_read_rec1/answer.txt
new file mode 100644
index 0000000..d83d20b
--- /dev/null
+++ b/21_read_rec1/answer.txt
@@ -0,0 +1,4 @@
+a=29, b=7
+a=2, b=9
+a=0, b=2
+297
diff --git a/21_read_rec1/grade.txt b/21_read_rec1/grade.txt
new file mode 100644
index 0000000..27dbba2
--- /dev/null
+++ b/21_read_rec1/grade.txt
@@ -0,0 +1,5 @@
+Grading at Fri 29 Oct 2021 02:12:30 AM UTC
+Your file matched the expected output
+Your output matched what we expected
+
+Overall Grade: A
diff --git a/21_read_rec1/test.c b/21_read_rec1/test.c
new file mode 100644
index 0000000..52fd4e4
--- /dev/null
+++ b/21_read_rec1/test.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void printDigits(int x) {
+  if (x == 0) {
+    printf("0");
+  }
+  else if (x < 0) {
+    printf("-");
+    printDigits(-x);
+  }
+  else {
+    int a = x/10;
+    int b = x %10;
+    printf("a=%d, b=%d\n",a,b);
+    if (a != 0) {
+      printDigits(a);
+    }
+    printf("%d",b);
+  }
+}
+
+
+int main(void) {
+  printDigits(297);
+  printf("\n");
+  return EXIT_SUCCESS;
+}