diff --git "a/\346\234\200\346\226\260\347\211\210v1.5.0" "b/\346\234\200\346\226\260\347\211\210v1.5.0"
index 02b9a6550b6f1ac053d2cf5fed10e8dc1d589550..2febb56c086b12a6efcc028021fdd6151a957cea 100644
--- "a/\346\234\200\346\226\260\347\211\210v1.5.0"
+++ "b/\346\234\200\346\226\260\347\211\210v1.5.0"
@@ -573,7 +573,7 @@ int starter(){
 	}
 	return 0;
 }
-open(int n){
+void open(int n){
 	if(n==0)return 0;
 	if(apps[n].developed && apps[n].dowloaded){//应用 
 		for(int i=0;i<100;i++){
@@ -587,20 +587,18 @@ open(int n){
 		while(apps[n].open){
 			paintframe(n);
 			printframe(n);
-			if(n==1){
-				setting();	
+			switch (n) {
+                case 1: setting();break;
+                case 2: appst();break;
+                default: 					
+                    apps[n].open=0;
+				    apps[n].developed=0;
+				    apps[n].dowloaded=0;
+				    stable();
+				    table();
+				    exit(0);
+                    break;
 			}
-			else if(n==2){
-				appst();
-			}	
-			else{
-				apps[n].open=0;
-				apps[n].developed=0;
-				apps[n].dowloaded=0;
-				stable();
-				table();
-				exit(0);
-			}		
 		} 
 	
 	}
@@ -611,7 +609,7 @@ open(int n){
 	}
 
 }
-table(){
+void table(){
 	nowapp=0;
 	print(ctable,HANG,LIE,0,0);
 	while(1){
@@ -639,14 +637,14 @@ table(){
 	}
 } 
 
-maincourse(){
+void maincourse(){
 	nowapp=0; 
 	printtab();//绘制tabline 
 	registry();//载入注册表 
 	stable();//绘制ctable 
 	table();//桌面程序 	
 } 
-main(){
+void main(){
 	starter();
 	maincourse();
 	return 0;