/in/foo.cc: In function 'void Multi(int)':
/in/foo.cc:47:12: warning: unused variable 'temp' [-Wunused-variable]
  int i,j,m,temp;
            ^~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:64:11: warning: unused variable 'i' [-Wunused-variable]
     int k,i,j,m;
           ^
/in/foo.cc:64:13: warning: unused variable 'j' [-Wunused-variable]
     int k,i,j,m;
             ^
/in/foo.cc:64:15: warning: unused variable 'm' [-Wunused-variable]
     int k,i,j,m;
               ^