diff --git a/terminal.h b/terminal.h
index 4cba63e..1d3db7b 100644
--- a/terminal.h
+++ b/terminal.h
@@ -14,7 +14,7 @@ typedef struct
 int Begin_inTermianl()
 {
     int langop;
-    printf("|**************SPP-pseudorange-positioning*****************************************|\n");
+        printf("|**************SPP-pseudorange-positioning*****************************************|\n");
 	printf("**@Author: KenanZhu\n**@Date: 2024/09/21\n**@Make by: C & Python & Matlab\n");
 	printf("**@INTRO: \n**The main functions of the software include:\n");
 	printf("**read RINEX3.04 files, and output three formats of document files,\n");
@@ -134,4 +134,4 @@ void End_inTerminal(FILE *fp_nav, FILE *fp_obs, int langop, int over)
         }
 }
 
-#endif
\ No newline at end of file
+#endif