View Compilation Error

0_0_19033075_15167.cpp:18:26: error: expected ',' or '...' before '%' token
 void add_edge(int a,int b%
                          ^
0_0_19033075_15167.cpp:18:26: error: expected ')' at end of input
0_0_19033075_15167.cpp:18:26: error: expected initializer at end of input