View Compilation Error

0_0_14227541_8804.cpp: In function 'int main()':
0_0_14227541_8804.cpp:124:55: error: 'struct BIT' has no member named 'ca'
                     add(sx[j + 1], -(bt.caly(xr) - bt.ca
                                                       ^
0_0_14227541_8804.cpp:124:55: error: expected ')' at end of input
0_0_14227541_8804.cpp:124:55: error: expected '}' at end of input
0_0_14227541_8804.cpp:124:55: error: expected '}' at end of input
0_0_14227541_8804.cpp:124:55: error: expected '}' at end of input
0_0_14227541_8804.cpp:124:55: error: expected '}' at end of input
0_0_14227541_8804.cpp:124:55: error: expected '}' at end of input