From da633eb55be20b86a004a172ce5fe720ae5e8de9 Mon Sep 17 00:00:00 2001
From: Sadeep Madurange <smadurange@users.noreply.github.com>
Date: Sun, 5 Dec 2021 12:06:51 +0800
Subject: 4.1

---
 4/1.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 4/1.c

(limited to '4')

diff --git a/4/1.c b/4/1.c
new file mode 100644
index 0000000..66c8f6e
--- /dev/null
+++ b/4/1.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+
+#define MAXLEN 1000
+
+/* finds the rightmost occurrence of t in s */
+int strindex(char s[], char t);
+
+int main(int argc, char *argv[]) {
+  int i, c, t;
+  char s[MAXLEN];
+
+  printf("source: ");
+  for (i = 0; i < MAXLEN - 1 && (c = getchar()) != '\n' && c != EOF; i++)
+    s[i] = c;
+  s[i] = 0;
+
+  printf("character: ");
+  t = getchar();
+  printf("index: %d\n", strindex(s, t));
+
+  return 0;
+}
+
+int strindex(char s[], char t) {
+  int i, index;
+
+  index = -1;
+
+  for (i = 0; s[i] != 0; i++) {
+    if (s[i] == t)
+      index = i;
+  }
+
+  return index;
+}
\ No newline at end of file
-- 
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