View Compilation Error

0_0_13804902_21370.cpp:1:12: error: #include expects "FILENAME" or <FILENAME>
 #include   
            ^
0_0_13804902_21370.cpp:2:12: error: #include expects "FILENAME" or <FILENAME>
 #include   
            ^
0_0_13804902_21370.cpp: In function 'void print(int)':
0_0_13804902_21370.cpp:26:30: error: 'printf' was not declared in this scope
         printf("%d ", next[n]);  
                              ^
0_0_13804902_21370.cpp: In function 'int main()':
0_0_13804902_21370.cpp:32:17: error: 'gets' was not declared in this scope
     while(gets(a) != NULL)  
                 ^
0_0_13804902_21370.cpp:32:22: error: 'NULL' was not declared in this scope
     while(gets(a) != NULL)  
                      ^
0_0_13804902_21370.cpp:34:27: error: 'strlen' was not declared in this scope
         int len = strlen(a);  
                           ^
0_0_13804902_21370.cpp:37:27: error: 'printf' was not declared in this scope
         printf("%d\n", len);  
                           ^