View Compilation Error

0_0_36716481_28928.cpp: In function 'int main()':
0_0_36716481_28928.cpp:19:39: error: 'memset' was not declared in this scope
   memset(numLevel, 0, sizeof(numLevel));
                                       ^
0_0_36716481_28928.cpp:32:5: error: expected unqualified-id before '}' token
     }
     ^
0_0_36716481_28928.cpp:33:14: error: missing template arguments before '<=' token
     if (rank <= numLevel[stu[i].solve] / 2) //排名在前一半
              ^
0_0_36716481_28928.cpp: At global scope:
0_0_36716481_28928.cpp:41:2: error: expected unqualified-id before 'return'
  return 0;
  ^
0_0_36716481_28928.cpp:42:1: error: expected declaration before '}' token
 }
 ^