View Compilation Error

0_0_23211189_19191.cpp: In function 'int main()':
0_0_23211189_19191.cpp:189:29: error: 'memset' was not declared in this scope
   memset(Seen,0,sizeof(Seen));
                             ^
0_0_23211189_19191.cpp: In function 'bool input()':
0_0_23211189_19191.cpp:269:26: error: 'memset' was not declared in this scope
  memset(Map,0,sizeof(Map));
                          ^
0_0_23211189_19191.cpp:281:6: error: expected primary-expression before '?' token
   M >?= strlen( temp );
      ^
0_0_23211189_19191.cpp:281:7: error: expected primary-expression before '=' token
   M >?= strlen( temp );
       ^
0_0_23211189_19191.cpp:281:22: error: 'strlen' was not declared in this scope
   M >?= strlen( temp );
                      ^
0_0_23211189_19191.cpp:281:23: error: expected ':' before ';' token
   M >?= strlen( temp );
                       ^
0_0_23211189_19191.cpp:281:23: error: expected primary-expression before ';' token