diff --git a/cal_mod.h b/cal_mod.h
index 95ba0f2..1d13f2e 100644
--- a/cal_mod.h
+++ b/cal_mod.h
@@ -243,6 +243,8 @@
         result_file = fopen(".\\Observation_Station_Site-Solving_by_Matlab\\LLA_result_for_Matlab.txt", "a+");
         fprintf(result_file, "\nEND");
         fclose(result_file);
+
+        return 1;
     }
 
 #endif
\ No newline at end of file
diff --git a/main.c b/main.c
index 76d6404..1647877 100644
--- a/main.c
+++ b/main.c
@@ -27,41 +27,119 @@ int main(void)
 	pobs_epoch obs_e = NULL;
 	pobs_body obs_b = NULL;//创建结构体指针，并将其初始化为空
 
-	//O文件读取
-	fp_obs = fopen("alic0600.22o", "r");//以只读的方式打开O文件
-	int o_epochnum = get_epochnum(fp_obs);//O文件历元数
-	rewind(fp_obs);
-	obs_h = (pobs_head)malloc(sizeof(obs_head));//给O文件头开辟空间
-	obs_e = (pobs_epoch)malloc(sizeof(obs_epoch) * o_epochnum);
-	obs_b = (pobs_body)malloc(sizeof(obs_body) * o_epochnum);
-		if (obs_h && obs_e && obs_b)
+	int over = 0;
+
+/* -------------------------------------------------------------------------- */	
+while(over == 0)
+	{
+		int     langop;
+		char obs_flie[20];
+		char nav_file[20];
+
+		printf("**************SPP-pseudorange-positioning**************\n");
+		printf("**@Author: KenanZhu\n**@Date: 2024/09/21\n**@Make by: C\n");
+		printf("**@INTRO: The main functions of the software include:\n");
+		printf("**read RINEX3.04 files, and output three formats of document files,\n");
+		printf("**please cooperate with the corresponding tools for processing.\n");
+		printf("**Specific please see:\n https://github.com/KenanZhu111/SPP_-pseudorange-positioning\n");
+		printf("*******************************************************\n\n");
+
+		printf("请选择您的语言:/Please choose your language\n(1)ENG/(0)中文\n");	
+		scanf("%d",&langop);
+		if (langop == 0)
+		{	printf("本程序只支持 ver3.04 RINEX文件的读取\n");
+			printf("请输入观测数据文件的文件名（包含拓展名）：\n");
+			scanf("%s", &obs_flie);}
+		if (langop == 1)
+		{	printf("This program only supports reading ver3.04 RINEX files\n");
+			printf("Please enter the file name (including the extension) of the observation data file.:\n");
+			scanf("%s", &obs_flie);}	
+/* -------------------------------------------------------------------------- */
+//O文件读取
+		fp_obs = fopen(obs_flie, "r");
+		if (langop == 0 && fp_obs == NULL)
+		{printf("观测文件%s读取失败,请检查文件名或者确认文件是否被移动\n", obs_flie);break;}
+		else if (langop == 0 && fp_obs != NULL)
+		{printf("观测文件%s读取成功,正在处理数据\n", obs_flie);}
+		
+		if (langop == 1 && fp_obs == NULL)
+		{printf("Observation file %s failed to be read. Please check the file name or confirm whether the file has been moved\n", obs_flie);break;}
+		else if (langop == 1 && fp_obs != NULL)	
+		{printf("The observation file %s has been read successfully and data is being processed\n", obs_flie);}
+
+		int o_epochnum = get_epochnum(fp_obs);//O文件历元数
+		rewind(fp_obs);
+		obs_h = (pobs_head)malloc(sizeof(obs_head));//给O文件头开辟空间
+		obs_e = (pobs_epoch)malloc(sizeof(obs_epoch) * o_epochnum);
+		obs_b = (pobs_body)malloc(sizeof(obs_body) * o_epochnum);
+			if (obs_h && obs_e && obs_b)
+			{
+				read_o_h(fp_obs, obs_h);//读取O文件头
+				read_o_b(fp_obs, obs_e, obs_b, obs_h->obstypenum_gps, obs_h->obstypenum_bds);//读取O数据块
+			}
+			fclose(fp_obs);//关闭O文件
+
+		if (langop == 0)
+		{	printf("观测文件读取完成！\n");
+			printf("请输入导航文件的文件名（包含拓展名）：\n");
+			scanf("%s", &nav_file);}
+		if (langop == 1)
+		{	printf("This program only supports reading ver3.04 RINEX files\n");
+			printf("Please enter the file name (including the extension) of the Navigation data file.:\n");
+			scanf("%s", &nav_file);}			
+/* -------------------------------------------------------------------------- */
+//N文件读取
+		fp_nav = fopen(nav_file, "r");
+		fp_obs = fopen(obs_flie, "r");
+		if (langop == 0 && fp_nav == NULL)
+		{printf("导航文件%s读取失败,请检查文件名或者确认文件是否被移动\n", nav_file);break;}
+		else if (langop == 0 && fp_nav != NULL)
+		{printf("观测文件%s读取成功,正在处理数据\n", nav_file);}
+		
+		if (langop == 1 && fp_nav == NULL)
+		{printf("Navigation file %s failed to be read. Please check the file name or confirm whether the file has been moved\n", nav_file);break;}
+		else if (langop == 1 && fp_nav != NULL)	
+		{printf("The Navigation file %s has been read successfully and data is being processed\n", nav_file);}
+
+		int gps_satnum = getgpssatnum(fp_nav);//获取导航文件GPS卫星数据块数
+		rewind(fp_nav);//将文件指针返回值起始位置
+		nav_h = (pnav_head)malloc(sizeof(nav_head));//给N文件头开辟空间
+		nav_b = (pnav_body)malloc(sizeof(nav_body) * gps_satnum * 20);
+			if (nav_h && nav_b)
+			{
+				read_n_h(fp_nav, nav_h);//读取N头文件
+				read_n_b(fp_nav, nav_b);//读取N数据块
+			}
+			fclose(fp_nav);//关闭N文件
+		
+		if (langop == 0)
+		{printf("导航文件读取完成！\n");printf("正在计算数据>\n");}
+		if (langop == 1)
+		{printf("Navigation file read complete!\n");printf("Calculating data>\n");}
+
+/* -------------------------------------------------------------------------- */
+		if (fp_obs != NULL && fp_nav != NULL)
 		{
-			read_o_h(fp_obs, obs_h);//读取O文件头
-			read_o_b(fp_obs, obs_e, obs_b, obs_h->obstypenum_gps, obs_h->obstypenum_bds);//读取O数据块
+			blh = (pblh)malloc(sizeof(pblh) * o_epochnum *256);
+			enu = (penu)malloc(sizeof(penu) * o_epochnum *256);
+			rah = (prah)malloc(sizeof(prah) * o_epochnum *256);
+			pos_t = (ppos_t)malloc(sizeof(ppos_t) * o_epochnum * 256);
+			station = (pstation)malloc(sizeof(pstation) * o_epochnum * 256);
+			
+			over = sat_gps_pos_clac(result_file, nav_b, obs_e, obs_b, obs_h, station, pos_t, blh, enu, rah, o_epochnum, gps_satnum);
+			
 		}
-		fclose(fp_obs);//关闭O文件
-
-	//N文件读取
-	fp_nav = fopen("brdm0600.22p", "r");//以只读的方式打开N文件
-	int gps_satnum = getgpssatnum(fp_nav);//获取导航文件GPS卫星数据块数
-	rewind(fp_nav);//将文件指针返回值起始位置
-	nav_h = (pnav_head)malloc(sizeof(nav_head));//给N文件头开辟空间
-	nav_b = (pnav_body)malloc(sizeof(nav_body) * gps_satnum * 20);
-		if (nav_h && nav_b)
-		{
-			read_n_h(fp_nav, nav_h);//读取N头文件
-			read_n_b(fp_nav, nav_b);//读取N数据块
-		}
-		fclose(fp_nav);//关闭N文件
-
-	blh = (pblh)malloc(sizeof(pblh) * o_epochnum *256);
-	enu = (penu)malloc(sizeof(penu) * o_epochnum *256);
-	rah = (prah)malloc(sizeof(prah) * o_epochnum *256);
-	pos_t = (ppos_t)malloc(sizeof(ppos_t) * o_epochnum * 256);
-	station = (pstation)malloc(sizeof(pstation) * o_epochnum * 256);
-	
-	sat_gps_pos_clac(result_file, nav_b, obs_e, obs_b, obs_h, station, pos_t, blh, enu, rah, o_epochnum, gps_satnum);
-
-	
+/* -------------------------------------------------------------------------- */
+		if (langop == 0)
+		{	if (over == 1)
+			{printf("数据生成完毕！");}
+			if (over != 1)
+			{printf("数据处理发生错误!");break;}}
+		if (langop == 1)
+		{	if (over == 1)
+			{printf("Data generation completed!");}
+			if (over != 1)
+			{printf("Data processing error!");break;}}
+	}
 	return 0;
 }
\ No newline at end of file
diff --git a/main.exe b/main.exe
index 9609150..447cf20 100644
Binary files a/main.exe and b/main.exe differ
diff --git a/rahcal.h b/rahcal.h
index 51eb32a..4532927 100644
--- a/rahcal.h
+++ b/rahcal.h
@@ -2,7 +2,6 @@
 #define _RAHCAL_H_
 #define PI 3.141592653589793
 
-
 #include<stdlib.h>
 #include<math.h>