5.5

1 files changed, 54 insertions, 0 deletions

diff --git a/5.5.c b/5.5.c
new file mode 100644
index 0000000..bd14a40
--- /dev/null
+++ b/5.5.c
@@ -0,0 +1,54 @@
+#include <stdio.h>
+
+char *strncpy(char to[], const char from[], int till);
+char *strncat(char to[], const char from[], int till);
+int strncmp_sneed(const char str1[], const char str2[], int till);
+
+int 
+main(void)
+{
+  char str[10];
+  printf("%s\n", strncpy(str, "gnu linux", 3));
+
+  printf("%s\n", strncat(str, " linux", 6));
+
+  if (!strncmp_sneed("seed", "seed feed", 3))
+    printf("suckses\n");
+
+  return 0;
+}
+
+char *strncpy(char to[], const char from[], int till)
+{
+  if (from[till] != '\0')
+    to[till+1] = '\0';
+
+  while (till--)
+    *(to+till) = *(from+till);
+
+  return to;
+}
+
+char *strncat(char to[], const char from[], int till)
+{
+  char *to_og = to;
+
+  while (*to)
+    ++to;
+
+  while (till--)
+    *(to+till) = *(from+till);
+
+  return to_og;
+}
+
+int 
+strncmp_sneed(const char str1[], const char str2[], int till)
+{
+  int count;
+
+  for (count = 0, --till; count < till && *(str1+count) == *(str2+count); count++)
+    ;
+
+  return *(str1+count) - *(str2+count);
+}