完成到第三章3.4 P48

ch03/inet_aton.c

@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <arpa/inet.h>
+void error_handling(char *message);
+
+int main(int argc, char *argv[])
+{
+    char *addr = "127.232.124.79";
+    struct sockaddr_in addr_inet;
+
+    if (!inet_aton(addr, &addr_inet.sin_addr))
+        error_handling("Conversion error");
+    else
+        printf("Network ordered integer addr: %#x \n", addr_inet.sin_addr.s_addr);
+    return 0;
+}
+
+void error_handling(char *message)
+{
+    fputs(message, stderr);
+    fputc('\n', stderr);
+    exit(1);
+}