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-rw-r--r--ch2/2-02_no-logical-operators.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/ch2/2-02_no-logical-operators.c b/ch2/2-02_no-logical-operators.c
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+++ b/ch2/2-02_no-logical-operators.c
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+#include <stdio.h>
+
+/* The C Programming Language, 2nd Edition
+ *
+ * Exercise 2-2: Write a loop equivalent to the 'for' loop above without
+ * using && or ||.
+ *
+ * (The for loop is:
+ *
+ * for (i=0; i < lim - 1 && (c = getchar()) != '\n' && c != EOF)
+ * i++;
+ *
+ * Answer: A recursive function should do the job. I think...
+ *
+ */
+
+#define LIMIT 17
+
+char test[LIMIT] = "";
+int i = 0;
+int c;
+
+void save_string(char s[]) {
+ if (i < LIMIT - 1) {
+ c = getchar();
+ if (c != '\n') {
+ if (c != EOF) {
+ s[i] = c;
+ i++;
+ } else {
+ return;
+ }
+ } else {
+ return;
+ }
+ save_string(s);
+ }
+}
+
+int main() {
+ save_string(test);
+ printf("%s\n", test);
+ return 0;
+}