View Compilation Error

0_0_11609639_26692.cpp:48: error: expected constructor, destructor, or type conversion before '<' token
0_0_11609639_26692.cpp:48: error: expected `,' or `;' before '<' token
0_0_11609639_26692.cpp: In function `void push(mat)':
0_0_11609639_26692.cpp:77: error: `s' undeclared (first use this function)
0_0_11609639_26692.cpp:77: error: (Each undeclared identifier is reported only once for each function it appears in.)