View Compilation Error

0_0_13524394_15205.cpp:7:10: error: variable or field 'BFS' declared void
 void BFS(t1,t2,t3,t4){
          ^
0_0_13524394_15205.cpp:7:10: error: 't1' was not declared in this scope
0_0_13524394_15205.cpp:7:13: error: 't2' was not declared in this scope
 void BFS(t1,t2,t3,t4){
             ^
0_0_13524394_15205.cpp:7:16: error: 't3' was not declared in this scope
 void BFS(t1,t2,t3,t4){
                ^
0_0_13524394_15205.cpp:7:19: error: 't4' was not declared in this scope
 void BFS(t1,t2,t3,t4){
                   ^