View Compilation Error

0_0_13524403_22701.cpp:7:9: error: 't1' was not declared in this scope
 int BFS(t1,t2,t3,t4){
         ^
0_0_13524403_22701.cpp:7:12: error: 't2' was not declared in this scope
 int BFS(t1,t2,t3,t4){
            ^
0_0_13524403_22701.cpp:7:15: error: 't3' was not declared in this scope
 int BFS(t1,t2,t3,t4){
               ^
0_0_13524403_22701.cpp:7:18: error: 't4' was not declared in this scope
 int BFS(t1,t2,t3,t4){
                  ^
0_0_13524403_22701.cpp:7:20: error: expression list treated as compound expression in initializer [-fpermissive]
 int BFS(t1,t2,t3,t4){
                    ^
0_0_13524403_22701.cpp:7:21: error: expected ',' or ';' before '{' token
 int BFS(t1,t2,t3,t4){
                     ^