Merge pull request #121 from daidai21/master

FIXED issues#70 issues#106

practical_exercises/key_exercises/函数模板.cpp

@@ -1,17 +1,18 @@
-#include<iostream>
 #include <cstring>
+#include <iostream>
 using namespace std;
 
-
-template<class T> T compareMax(T t1,T t2){
+template <class T>
+T compareMax(T t1, T t2) {
   return t1 > t2 ? t1 : t2;
 }
 
-template<> char* compareMax<char *>(char *s1,char *s2){
+template <>
+const char *compareMax<const char *>(const char *s1, const char *s2) {
+  cout << "[for debug]" << " call compareMax template" << endl;
   return strcmp(s1, s2) >= 0 ? s1 : s2;
 }
-int main(int argc, char const *argv[])
-{
+int main(int argc, char const *argv[]) {
   cout << compareMax(1, 2) << endl;
   cout << compareMax("asda", "qweq") << endl;
   system("pause");