View Compilation Error

0_0_11689236_28296.cpp: In function `void print(mat)':
0_0_11689236_28296.cpp:47: error: expected primary-expression before '<' token
0_0_11689236_28296.cpp:47: error: `span' undeclared (first use this function)
0_0_11689236_28296.cpp:47: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11689236_28296.cpp:47: error: expected `;' before "style"