View Compilation Error

0_0_18027630_10737.cpp:1:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_18027630_10737.cpp:2:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_18027630_10737.cpp:3:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_18027630_10737.cpp:4:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_18027630_10737.cpp: In function 'int main()':
0_0_18027630_10737.cpp:11:25: error: 'scanf' was not declared in this scope
     while(scanf("%s",str)==1)
                         ^
0_0_18027630_10737.cpp:13:23: error: 'strlen' was not declared in this scope
         len=strlen(str);
                       ^
0_0_18027630_10737.cpp:14:25: error: 'sort' was not declared in this scope
         sort(str,str+len);
                         ^
0_0_18027630_10737.cpp:15:9: error: 'pu' was not declared in this scope
         pu...        
         ^
0_0_18027630_10737.cpp:15:11: error: expected '}' at end of input
         pu...        
           ^
0_0_18027630_10737.cpp:15:11: error: expected '}' at end of input