diff --git a/main.cpp b/main.cpp
index 71867fc..3afbb22 100644
--- a/main.cpp
+++ b/main.cpp
@@ -7,13 +7,13 @@
 
 using namespace std;
 
-int datatype=0, ntax, nseq;
+int intype=0, outype=0, ntax, nseq;
 char * fn;
 
 void show_help(int help_num);
 void read_input(void);
 
-int readPhy(){
+void readPhy(){
   int num=0;
   cout << "readphy is working, filename is " << fn << endl;
   //read file
@@ -28,9 +28,22 @@ int readPhy(){
   ntax = stoi (sntax); nseq = stoi (snseq); // string to int
   cout << "ntax=" << ntax << " nseq=" << nseq << endl;    
   //read sequence
-
+  string taxa[ntax], sequ[ntax];
+  //taxa[ntax] = new string*[];
+  int lennum;
+  for(lennum=0;lennum<ntax;lennum++){
+    getline(seqfile,snall);
+    istringstream istr(snall);
+    istr >> taxa[lennum]; istr >> sequ[lennum];
+    cout << "tax" << lennum << " is " << taxa << "; seq" << lennum << " is " << sequ << endl;   
+  }
   seqfile.close();
-  return num;
+//  return taxa;
+//  return sequ;
+}
+
+void writeFas(){
+  
 }
 
 void procargs (int nargs, char ** arg){ //*arg 视为整体，是字符串指针
@@ -54,12 +67,18 @@ void procargs (int nargs, char ** arg){ //*arg 视为整体，是字符串指针
     switch (*++cp){//先++
       case 'f':
         cp++;
-	if (*cp=='f') datatype=1; 
-	if (*cp=='n') datatype=2;
-	if (*cp=='p') {datatype=3; cout << "datatype is phylip, " << datatype << endl;}
+	if (*cp=='f') intype=1; 
+	if (*cp=='n') intype=2;
+	if (*cp=='p') {intype=3; cout << "intype is phylip, " << intype << endl;}
 	break;
       case 'h': show_help(1); break;
       case 'i': cp++; fn = cp; break;
+      case 't':
+	cp++;
+	if (*cp=='f') outype=1; 
+	if (*cp=='n') outype=2;
+	if (*cp=='p') {outype=3; cout << "intype is phylip, " << intype << endl;}
+	break;
       default: cout << "Unrecognized agruments " << *(arg+i) << endl; exit(0);
     }
   }
@@ -75,12 +94,21 @@ void show_help (int help_num){
 }
 
 void read_input (void){
-  if (datatype==3) readPhy();
+  if (intype==3) readPhy();
+}
+
+void write_output (void){
+  switch(outype){
+    case '1': ; break;
+    case '2': ; break;
+    case '3': ; break;
+  }
 }
 
 int main(int argc, char **argv){
   procargs (argc, argv);
   read_input();
+  write_output();
   int  i;
   for (i = 0; i < argc; i++) cout << "argument "<< i << " is " << *(argv+i) << endl;
   return 1;