5.6

1 files changed, 47 insertions, 0 deletions

diff --git a/5.6.5.c b/5.6.5.c
new file mode 100644
index 0000000..d04da1e
--- /dev/null
+++ b/5.6.5.c
@@ -0,0 +1,47 @@
+#include <stdio.h>
+#include <ctype.h>
+
+#define MAXLEN 1000
+
+int atoi(char str[]);
+int sneed_getline(char str[], int max);
+
+int 
+main(void)
+{
+  char str[MAXLEN];
+  while (sneed_getline(str, MAXLEN)) {
+    printf("string ver : %s", str);
+    printf("int    ver : %d\n", atoi(str));
+  }
+  return 0;
+}
+
+int 
+atoi(char str[])
+{
+  int val;
+
+  for (val = 0; isdigit(*str) && *str; str++)
+    val = val * 10 + *str -'0';
+
+  return val;
+}
+
+int
+sneed_getline(char str[], int max)
+{
+  char input;
+  char *str_og = str;
+
+  while (--max && (*str = input = getchar()) != EOF && input != '\n')
+    str++;
+
+  if (!max && input != '\n')
+    *str = '\n', str++;
+
+  str = '\0';
+
+  return str - str_og -1;
+}
+