View Compilation Error

0_0_13994812_24345.cpp: In function 'int main()':
0_0_13994812_24345.cpp:81:61: error: 'add' was not declared in this scope
                     add_edge(catlover[i].id,doglover[j].id),add
                                                             ^
0_0_13994812_24345.cpp:81:61: error: expected '}' at end of input
0_0_13994812_24345.cpp:81:61: error: expected '}' at end of input
0_0_13994812_24345.cpp:81:61: error: expected '}' at end of input