made history part

.gitignore

@@ -1,2 +1,4 @@
 .DS_Store
-main
+main
+a.out
+*.dSYM

history.c

@@ -0,0 +1,22 @@
+#include "include/minishell.h"
+//gcc history.c -lreadlineでコンパイル
+int main()
+{
+	char *command;
+
+	command = NULL;
+	while (1)
+	{
+		command = readline("6shell> ");
+		if (command == NULL || strlen(command) == 0)
+		{
+			free(command);
+			break;
+		}
+		//printf("command is '%s'\n", command);
+		add_history(command);
+		//コマンドの処理
+		free(command);
+	}
+	return 0;
+}

include/minishell.h

@@ -4,3 +4,5 @@
 #include <unistd.h>
 #include "./builtin.h"
 #include <string.h>
+#include <readline/readline.h>
+#include <readline/history.h>