View Compilation Error

0_0_32864069_27345.cpp: In function 'void bfs(int)':
0_0_32864069_27345.cpp:19:29: error: 'memset' was not declared in this scope
     memset(dis,0,sizeof(dis));
                             ^
0_0_32864069_27345.cpp: In function 'void init()':
0_0_32864069_27345.cpp:56:32: error: 'memset' was not declared in this scope
     memset(head,-1,sizeof(head));
                                ^
0_0_32864069_27345.cpp: In function 'int main()':
0_0_32864069_27345.cpp:87:9: error: expected ';' before 'else'
         else{
         ^
0_0_32864069_27345.cpp:98:1: error: expected '}' at end of input
 }//https://blog.csdn.net/qaz135135135/article/details/52095489
 ^
0_0_32864069_27345.cpp:98:1: error: expected '}' at end of input