View Compilation Error

0_0_22972979_28705.cpp:6:10: error: cannot declare '::main' to be a template
 int main(){
          ^
0_0_22972979_28705.cpp: In function 'int main()':
0_0_22972979_28705.cpp:7:9: error: declaration of 'int T'
     int T;//
         ^
0_0_22972979_28705.cpp:5:10: error:  shadows template parm 'class T'
 template<typename T>
          ^