更新了文件名。开始了数据结构

Chapter07/chararr.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+
+char *mystrcpy(char *dest, const char *src)
+{
+    char *ret = dest;
+    if (NULL != dest && NULL != src)
+        while ((*dest++ = *src++) != '\0')
+            ;
+
+    return ret;
+}
+
+char *mystrncpy(char *dest, const char *src, size_t n)
+{
+    int i;
+    for (i = 0; i < n && (dest[i] = src[i]); i++)
+        ;
+
+    for (; i < n; i++)
+        dest[i] = '\0';
+
+    return dest;
+}
+
+
+int main()
+{
+    char str1[] = "helloworld";
+    char str2[128];
+
+    // mystrcpy(str2, str1);
+
+    mystrncpy(str2, str1, 5);
+
+    puts(str2);
+
+    exit(0);
+}