View Compilation Error

0_0_31532591_10910.cpp: In function 'void modify(double, double, int, int)':
0_0_31532591_10910.cpp:41:21: error: cannot convert 'Node' to 'double' in initialization
     double l = seg[k]
                     ^
0_0_31532591_10910.cpp:41:21: error: expected ',' or ';' at end of input
0_0_31532591_10910.cpp:41:21: error: expected '}' at end of input