View Compilation Error

0_0_30284922_8093.cpp:11:9: error: 'maxm' was not declared in this scope
 int pre[maxm];    //存储前驱节点
         ^
0_0_30284922_8093.cpp:12:9: error: 'maxm' was not declared in this scope
 int dis[maxm];    //用来表示源点到当前节点的最大可以流过来多少流量
         ^
0_0_30284922_8093.cpp: In function 'void init()':
0_0_30284922_8093.cpp:18:12: error: 'pre' was not declared in this scope
     memset(pre,-1,sizeof(pre));
            ^
0_0_30284922_8093.cpp: In function 'int bfs(int, int)':
0_0_30284922_8093.cpp:24:5: error: 'pre' was not declared in this scope
     pre[start] = 0;
     ^
0_0_30284922_8093.cpp:25:5: error: 'dis' was not declared in this scope
     dis[start] = Inf;
     ^
0_0_30284922_8093.cpp: In function 'void ek(int, int, int)':
0_0_30284922_8093.cpp:54:24: error: 'pre' was not declared in this scope
             int last = pre[k];
                        ^
0_0_30284922_8093.cpp: In function 'int main()':
0_0_30284922_8093.cpp:73:16: error: 'dis' was not declared in this scope
         memset(dis,0,sizeof(dis));
                ^