View Compilation Error

0_0_20973667_24624.cpp: In function 'void init()':
0_0_20973667_24624.cpp:8:24: error: 'memset' was not declared in this scope
  memset(mp,0,sizeof(mp));
                        ^
0_0_20973667_24624.cpp: In function 'bool input()':
0_0_20973667_24624.cpp:13:8: error: 'cin' was not declared in this scope
  while(cin>>n,n) {
        ^
0_0_20973667_24624.cpp:16:25: error: 'scanf' was not declared in this scope
     scanf("%d",&mp[i][j]);
                         ^
0_0_20973667_24624.cpp: In function 'void cal()':
0_0_20973667_24624.cpp:30:46: error: 'max' was not declared in this scope
     dp[i] = max(dp[i],dp[i^(1<<j)] + mp[k][j]);
                                              ^
0_0_20973667_24624.cpp:33:22: error: 'max' was not declared in this scope
   ans = max(ans,dp[i]);
                      ^
0_0_20973667_24624.cpp:35:2: error: 'cout' was not declared in this scope
  cout<<ans<<endl;
  ^
0_0_20973667_24624.cpp:35:13: error: 'endl' was not declared in this scope
  cout<<ans<<endl;
             ^