View Compilation Error

0_0_18227154_13865.cpp: In function 'int main()':
0_0_18227154_13865.cpp:48:13: error: 'pt' was not declared in this scope
             pt.from=from;
             ^
0_0_18227154_13865.cpp:74:17: error: 'pt' was not declared in this scope
                 pt.from=t;
                 ^