1 files changed, 43 insertions, 0 deletions

diff --git a/2/4.c b/2/4.c
new file mode 100644
index 0000000..4ca70ce
--- /dev/null
+++ b/2/4.c
@@ -0,0 +1,43 @@
+#include <stdio.h>
+
+#define MAXLEN 1000
+
+void squeeze(char s1[], char s2[]);
+
+/* deletes any character in one string from another string */
+int main(int argc, char *argv[]) {
+  int i, c;
+  char s1[MAXLEN], s2[MAXLEN];
+
+  printf("input first string\n");
+  for (i = 0; i < MAXLEN - 1 && (c = getchar()) != '\n' && c != EOF; i++)
+    s1[i] = c;
+  s1[i] = 0;
+
+  printf("input second string\n");
+  for (i = 0; i < MAXLEN - 1 && (c = getchar()) != '\n' && c != EOF; i++)
+    s2[i] = c;
+  s2[i] = 0;
+
+  squeeze(s1, s2);
+  printf("result: %s\n", s1);
+
+  return 0;
+}
+
+void squeeze(char s1[], char s2[]) {
+  int i, j, k, delete;
+
+  for (i = j = 0; s1[i] != 0; i++) {
+    delete = 0;
+    for (k = 0; s2[k] != 0; k++) {
+      if (s1[i] == s2[k])
+        delete = 1;
+    }
+
+    if (!delete)
+      s1[j++] = s1[i];
+  }
+
+  s1[j] = 0;
+}
\ No newline at end of file