for (row = 0;row<no_records;row++){
   strcpy(line[row],ID[row]);
   strcpy(gra[row],grade[row]);
}
for (int i=0;i<no_records-2;i++){
  for (row=0;row<no_records-2;row++){
     if(strcmp(line[row],line[row+1])>0){
        strcpy(tempID[0],line[row]);      
        strcpy(line[row],line[row+1]);          
        strcpy(line[row+1],tempID[0]);
        strcpy(tempgra[0],gra[row]);
        strcpy(gra[row],gra[row+1]);
        strcpy(gra[row+1],tempgra[0]);
     }
   }
}