View Compilation Error

0_0_37803066_17133.cpp: In member function 'void segment<T>::poswithdis(const ld&, point<T>&, point<T>&)':
0_0_37803066_17133.cpp:142:9: error: missing template arguments before 'c'
   point c=(a+b)*0.5;
         ^
0_0_37803066_17133.cpp:143:9: error: missing template arguments before 'ca'
   point ca=a-c;
         ^
0_0_37803066_17133.cpp:144:8: error: 'ca' was not declared in this scope
   ld x=ca.len();
        ^
0_0_37803066_17133.cpp:146:9: error: missing template arguments before 'dc1'
   point dc1=ca.rotate90();
         ^
0_0_37803066_17133.cpp:147:9: error: missing template arguments before 'dc2'
   point dc2=ca.rotate270();
         ^
0_0_37803066_17133.cpp:148:3: error: 'dc1' was not declared in this scope
   dc1=dc1/dc1.len()*s;
   ^
0_0_37803066_17133.cpp:149:3: error: 'dc2' was not declared in this scope
   dc2=dc2/dc2.len()*s;
   ^
0_0_37803066_17133.cpp:150:6: error: 'c' was not declared in this scope
   d1=c+dc1;
      ^