Update ex6_25_26.cpp

ch06/ex6_25_26.cpp

@@ -1,4 +1,4 @@
-//! @Alan
+//! @Yue Wang
 //!
 //! Exercise 6.25: Write a main function that takes two arguments.
 //! Concatenate the supplied arguments and print the resulting string.
@@ -7,19 +7,14 @@
 //! in this section. Print the values of the arguments passed to main.
 //!
 
-
-
 #include <iostream>
 #include <string>
 
 int main(int argc, char **argv)
 {
     std::string str;
     for (int i = 1; i != argc; ++i)
-    {
-        str += argv[i];
-        str += " ";
-    }
+        str += argv[i] + " ";
 
     std::cout << str << std::endl;
     return 0;